diff --git a/core/COPYRIGHT.txt b/core/COPYRIGHT.txt
index 6c6d0ad34e7f032..79980f7e23bc7d9 100644
--- a/core/COPYRIGHT.txt
+++ b/core/COPYRIGHT.txt
@@ -45,8 +45,6 @@ JavaScript
   jQuery Metadata - Copyright (c) 2006 John Resig, Yehuda Katz, Jörn Zaefferer,
     Paul McLanahan
 
-  jQuery Once - Copyright (c) 2009 Konstantin Käfer
-
   jQuery UI - Copyright (c) 2015 by the authors and other contributors
     (http://jqueryui.com/about)
 
diff --git a/core/assets/vendor/jquery-once/jquery.once.js b/core/assets/vendor/jquery-once/jquery.once.js
deleted file mode 100644
index 88e088130267bec..000000000000000
--- a/core/assets/vendor/jquery-once/jquery.once.js
+++ /dev/null
@@ -1,177 +0,0 @@
-/*!
- * jQuery Once v2.2.3 - http://github.com/robloach/jquery-once
- * @license MIT, GPL-2.0
- *   http://opensource.org/licenses/MIT
- *   http://opensource.org/licenses/GPL-2.0
- */
-
-/**
- * Universal Module Definition
- *
- * jQuery Once has a dependency on jQuery, so we wrap the code with a UMD
- * pattern in order to allow loading jQuery and jQuery Once through a module
- * definition like CommonJS, AMD, or through a global object.
- *
- * @see {@link http://github.com/umdjs/umd}
- */
-(function (factory) {
-  'use strict';
-
-  if (typeof exports === 'object' && typeof exports.nodeName !== 'string') {
-    // CommonJS
-    factory(require('jquery'));
-  } else if (typeof define === 'function' && define.amd) {
-    // AMD
-    /* globals define */
-    define(['jquery'], factory);
-  } else {
-    // Global object
-    /* globals jQuery */
-    factory(jQuery);
-  }
-})(function ($) {
-  'use strict';
-
-  /**
-   * Ensures that the given ID is valid, returning 'once' if one is not given.
-   *
-   * @param {string} [id=once]
-   *   A string representing the ID to check. Defaults to `'once'`.
-   *
-   * @returns {number} The valid ID name.
-   *
-   * @throws TypeError when an ID is provided, but not a string.
-   * @private
-   */
-  var checkId = function (id) {
-    id = id || 'once';
-    if (typeof id !== 'string') {
-      throw new TypeError('The jQuery Once id parameter must be a string');
-    }
-
-    return id;
-  };
-
-  /**
-   * Filter elements that have yet to be processed by the given data ID.
-   *
-   * @param {string} [id=once]
-   *   The data ID used to determine whether the given elements have already
-   *   been processed or not. Defaults to `'once'`.
-   *
-   * @returns {jQuery} jQuery collection of elements that have now run once by
-   *   the given ID.
-   *
-   * @example
-   * ``` javascript
-   * // The following will change the color of each paragraph to red, just once
-   * // for the 'changecolor' key.
-   * $('p').once('changecolor').css('color', 'red');
-   *
-   * // .once() will return a set of elements that yet to have the once ID
-   * // associated with them. You can return to the original collection set by
-   * // using .end().
-   * $('p')
-   *   .once('changecolorblue')
-   *     .css('color', 'blue')
-   *   .end()
-   *   .css('color', 'red');
-   *
-   * // To execute a function on the once set, you can use jQuery's each().
-   * $('div.calendar').once().each(function () {
-   *   // Since there is no once ID provided here, the key will be 'once'.
-   * });
-   * ```
-   *
-   * @see removeOnce
-   * @see findOnce
-   * @this jQuery
-   *
-   * @global
-   * @public
-   */
-  $.fn.once = function (id) {
-    // Build the jQuery Once data name from the provided ID.
-    var name = 'jquery-once-' + checkId(id);
-
-    // Find elements that don't have the jQuery Once data applied to them yet.
-    return this.filter(function () {
-      return $(this).data(name) !== true;
-    }).data(name, true);
-  };
-
-  /**
-   * Removes the once data from elements, based on the given ID.
-   *
-   * @param {string} [id=once]
-   *   A string representing the name of the data ID which should be used when
-   *   filtering the elements. This only filters elements that have already been
-   *   processed by the once function. The ID should be the same ID that was
-   *   originally passed to the once() function. Defaults to `'once'`.
-   *
-   * @returns {jQuery} jQuery collection of elements that were acted upon to remove their
-   *    once data.
-   *
-   * @example
-   * ``` javascript
-   * // Remove once data with the 'changecolor' ID. The result set is the
-   * // elements that had their once data removed.
-   * $('p').removeOnce('changecolor').css('color', '');
-   *
-   * // Any jQuery function can be performed on the result set.
-   * $('div.calendar').removeOnce().each(function () {
-   *   // Remove the calendar behavior.
-   * });
-   * ```
-   *
-   * @see once
-   * @this jQuery
-   *
-   * @global
-   * @public
-   */
-  $.fn.removeOnce = function (id) {
-    // Filter through the elements to find the once'd elements.
-    return this.findOnce(id).removeData('jquery-once-' + checkId(id));
-  };
-
-  /**
-   * Filters elements that have already been processed once.
-   *
-   * @param {string} [id=once]
-   *   A string representing the name of the data id which should be used when
-   *   filtering the elements. This only filters elements that have already
-   *   been processed by the once function. The id should be the same id that
-   *   was originally passed to the once() function. Defaults to 'once'.
-   *
-   * @returns {jQuery} jQuery collection of elements that have been run once.
-   *
-   * @example
-   * ``` javascript
-   * // Find all elements that have been changecolor'ed once.
-   * $('p').findOnce('changecolor').each(function () {
-   *   // This function is called for all elements that has already once'd.
-   * });
-   *
-   * // Find all elements that have been acted on with the default 'once' key.
-   * $('p').findOnce().each(function () {
-   *   // This function is called for all elements that have been acted on with
-   *   // a 'once' action.
-   * });
-   * ```
-   *
-   * @see once
-   * @this jQuery
-   *
-   * @global
-   * @public
-   */
-  $.fn.findOnce = function (id) {
-    // Filter the elements by which do have the data.
-    var name = 'jquery-once-' + checkId(id);
-
-    return this.filter(function () {
-      return $(this).data(name) === true;
-    });
-  };
-});
diff --git a/core/assets/vendor/jquery-once/jquery.once.min.js b/core/assets/vendor/jquery-once/jquery.once.min.js
deleted file mode 100644
index 47a878053ee814d..000000000000000
--- a/core/assets/vendor/jquery-once/jquery.once.min.js
+++ /dev/null
@@ -1,8 +0,0 @@
-/*!
- * jQuery Once v2.2.3 - http://github.com/robloach/jquery-once
- * @license MIT, GPL-2.0
- *   http://opensource.org/licenses/MIT
- *   http://opensource.org/licenses/GPL-2.0
- */
-(function(e){"use strict";if(typeof exports==="object"&&typeof exports.nodeName!=="string"){e(require("jquery"))}else if(typeof define==="function"&&define.amd){define(["jquery"],e)}else{e(jQuery)}})(function(t){"use strict";var r=function(e){e=e||"once";if(typeof e!=="string"){throw new TypeError("The jQuery Once id parameter must be a string")}return e};t.fn.once=function(e){var n="jquery-once-"+r(e);return this.filter(function(){return t(this).data(n)!==true}).data(n,true)};t.fn.removeOnce=function(e){return this.findOnce(e).removeData("jquery-once-"+r(e))};t.fn.findOnce=function(e){var n="jquery-once-"+r(e);return this.filter(function(){return t(this).data(n)===true})}});
-//# sourceMappingURL=jquery.once.min.js.map
\ No newline at end of file
diff --git a/core/assets/vendor/jquery-once/jquery.once.min.js.map b/core/assets/vendor/jquery-once/jquery.once.min.js.map
deleted file mode 100644
index a42313cc289f12a..000000000000000
--- a/core/assets/vendor/jquery-once/jquery.once.min.js.map
+++ /dev/null
@@ -1 +0,0 @@
-{"version":3,"sources":["jquery.once.js"],"names":["factory","exports","nodeName","require","define","amd","jQuery","$","checkId","id","TypeError","fn","once","name","this","filter","data","removeOnce","findOnce","removeData"],"mappings":";;;;;;CAgBA,SAAWA,GACT,aAEA,UAAWC,UAAY,iBAAmBA,QAAQC,WAAa,SAAU,CAEvEF,EAAQG,QAAQ,gBACX,UAAWC,SAAW,YAAcA,OAAOC,IAAK,CAGrDD,OAAO,CAAC,UAAWJ,OACd,CAGLA,EAAQM,UAbZ,CAeG,SAAUC,GACX,aAaA,IAAIC,EAAU,SAAUC,GACtBA,EAAKA,GAAM,OACX,UAAWA,IAAO,SAAU,CAC1B,MAAM,IAAIC,UAAU,iDAGtB,OAAOD,GAyCTF,EAAEI,GAAGC,KAAO,SAAUH,GAEpB,IAAII,EAAO,eAAiBL,EAAQC,GAGpC,OAAOK,KAAKC,OAAO,WACjB,OAAOR,EAAEO,MAAME,KAAKH,KAAU,OAC7BG,KAAKH,EAAM,OAiChBN,EAAEI,GAAGM,WAAa,SAAUR,GAE1B,OAAOK,KAAKI,SAAST,GAAIU,WAAW,eAAiBX,EAAQC,KAkC/DF,EAAEI,GAAGO,SAAW,SAAUT,GAExB,IAAII,EAAO,eAAiBL,EAAQC,GAEpC,OAAOK,KAAKC,OAAO,WACjB,OAAOR,EAAEO,MAAME,KAAKH,KAAU","file":"jquery.once.min.js"}
\ No newline at end of file
diff --git a/core/core.libraries.yml b/core/core.libraries.yml
index 5018d1f7d080023..f57d962fe3f4f20 100644
--- a/core/core.libraries.yml
+++ b/core/core.libraries.yml
@@ -357,7 +357,6 @@ drupal.ajax:
     - core/drupal.nodelist.foreach
     - core/drupal.progress
     - core/once
-    - core/jquery.once.bc
     - core/tabbable
 
 drupal.announce:
@@ -442,7 +441,6 @@ drupal.batch:
     - core/drupal.ajax
     - core/drupal.progress
     - core/once
-    - core/jquery.once.bc
 
 drupal.checkbox:
   version: VERSION
@@ -463,7 +461,6 @@ drupal.collapse:
     - core/drupal
     - core/drupal.form
     - core/once
-    - core/jquery.once.bc
 
 drupal.customevent:
   version: VERSION
@@ -574,7 +571,6 @@ drupal.dropbutton:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
 
 drupal.element.closest:
   version: VERSION
@@ -604,7 +600,6 @@ drupal.form:
     - core/drupal
     - core/drupal.debounce
     - core/once
-    - core/jquery.once.bc
 
 drupal.machine-name:
   version: VERSION
@@ -613,7 +608,6 @@ drupal.machine-name:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/drupalSettings
     - core/drupal.form
@@ -654,7 +648,6 @@ drupal.states:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
 
 drupal.string.includes:
   version: VERSION
@@ -679,7 +672,6 @@ drupal.tabledrag:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
 
 drupal.tableheader:
   version: VERSION
@@ -690,7 +682,6 @@ drupal.tableheader:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
     - core/drupal.displace
 
 drupal.tableresponsive:
@@ -701,7 +692,6 @@ drupal.tableresponsive:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
 
 drupal.tableselect:
   version: VERSION
@@ -712,7 +702,6 @@ drupal.tableselect:
     - core/drupal.checkbox
     - core/jquery
     - core/once
-    - core/jquery.once.bc
 
 drupal.timezone:
   version: VERSION
@@ -722,7 +711,6 @@ drupal.timezone:
     - core/drupal.nodelist.foreach
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
 
 drupal.vertical-tabs:
@@ -736,7 +724,6 @@ drupal.vertical-tabs:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/drupalSettings
     - core/drupal.form
@@ -808,33 +795,6 @@ shepherd:
   js:
     assets/vendor/shepherd/shepherd.min.js: { minified: true }
 
-jquery.once:
-  remote: https://github.com/RobLoach/jquery-once
-  version: "2.2.3"
-  license:
-    name: GNU-GPL-2.0-or-later
-    url: https://raw.githubusercontent.com/RobLoach/jquery-once/2.2.3/LICENSE.md
-    gpl-compatible: true
-  js:
-    assets/vendor/jquery-once/jquery.once.min.js: { weight: -19, minified: true }
-  dependencies:
-    - core/jquery
-    - core/jquery.once.bc
-  deprecated: The %library_id% asset library is deprecated in Drupal 9.3.0 and will be removed in Drupal 10.0.0. Use the core/once library instead. See https://www.drupal.org/node/3158256
-
-# Internal library, do not depend on it.
-# The library will be removed in Drupal 10.0.0.
-jquery.once.bc:
-  version: VERSION
-  js:
-    assets/vendor/jquery-once/jquery.once.min.js: { weight: -19, minified: true }
-    misc/jquery.once.bc.js: {}
-  dependencies:
-    - core/drupal
-    - core/jquery
-    - core/once
-    - core/drupal.object.assign
-
 jquery.ui:
   version: &jquery_ui_version "1.13.1"
   license: &jquery_ui_license
@@ -1144,7 +1104,6 @@ drupal.dialog.off_canvas:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/drupal.ajax
     - core/drupal.announce
diff --git a/core/misc/jquery.once.bc.es6.js b/core/misc/jquery.once.bc.es6.js
deleted file mode 100644
index 0a25d7544e446d6..000000000000000
--- a/core/misc/jquery.once.bc.es6.js
+++ /dev/null
@@ -1,55 +0,0 @@
-/**
- * @file
- * This file allows calls to `once()` and `once.remove()` to also populate the
- * jQuery.once registry.
- *
- * It allows contributed code still using jQuery.once to behave as expected:
- * @example
- * once('core-once-call', 'body');
- *
- * // The following will work in a contrib module still using jQuery.once:
- * $('body').once('core-once-call'); // => returns empty object
- */
-
-(($, once) => {
-  const deprecatedMessageSuffix = `is deprecated in Drupal 9.3.0 and will be removed in Drupal 10.0.0. Use the core/once library instead. See https://www.drupal.org/node/3158256`;
-
-  // Trigger a deprecation error when using jQuery.once methods.
-  const originalJQOnce = $.fn.once;
-  const originalJQRemoveOnce = $.fn.removeOnce;
-  // Do not deprecate findOnce because it is used internally by jQuery.once().
-
-  $.fn.once = function jQueryOnce(id) {
-    Drupal.deprecationError({
-      message: `jQuery.once() ${deprecatedMessageSuffix}`,
-    });
-    return originalJQOnce.apply(this, [id]);
-  };
-  $.fn.removeOnce = function jQueryRemoveOnce(id) {
-    Drupal.deprecationError({
-      message: `jQuery.removeOnce() ${deprecatedMessageSuffix}`,
-    });
-    return originalJQRemoveOnce.apply(this, [id]);
-  };
-
-  // We'll replace the whole library so keep a version in cache for later.
-  const drupalOnce = once;
-
-  // When calling once(), also populate jQuery.once registry.
-  function augmentedOnce(id, selector, context) {
-    // Do not trigger deprecation warnings for the BC layer calls.
-    originalJQOnce.apply($(selector, context), [id]);
-    return drupalOnce(id, selector, context);
-  }
-
-  // When calling once.remove(), also remove it from jQuery.once registry.
-  function remove(id, selector, context) {
-    // Do not trigger deprecation warnings for the BC layer calls.
-    originalJQRemoveOnce.apply($(selector, context), [id]);
-    return drupalOnce.remove(id, selector, context);
-  }
-
-  // Expose the rest of @drupal/once API and replace @drupal/once library with
-  // the version augmented with jQuery.once calls.
-  window.once = Object.assign(augmentedOnce, drupalOnce, { remove });
-})(jQuery, once);
diff --git a/core/misc/jquery.once.bc.js b/core/misc/jquery.once.bc.js
deleted file mode 100644
index e41fe3df32fc8a4..000000000000000
--- a/core/misc/jquery.once.bc.js
+++ /dev/null
@@ -1,42 +0,0 @@
-/**
-* DO NOT EDIT THIS FILE.
-* See the following change record for more information,
-* https://www.drupal.org/node/2815083
-* @preserve
-**/
-
-(($, once) => {
-  const deprecatedMessageSuffix = `is deprecated in Drupal 9.3.0 and will be removed in Drupal 10.0.0. Use the core/once library instead. See https://www.drupal.org/node/3158256`;
-  const originalJQOnce = $.fn.once;
-  const originalJQRemoveOnce = $.fn.removeOnce;
-
-  $.fn.once = function jQueryOnce(id) {
-    Drupal.deprecationError({
-      message: `jQuery.once() ${deprecatedMessageSuffix}`
-    });
-    return originalJQOnce.apply(this, [id]);
-  };
-
-  $.fn.removeOnce = function jQueryRemoveOnce(id) {
-    Drupal.deprecationError({
-      message: `jQuery.removeOnce() ${deprecatedMessageSuffix}`
-    });
-    return originalJQRemoveOnce.apply(this, [id]);
-  };
-
-  const drupalOnce = once;
-
-  function augmentedOnce(id, selector, context) {
-    originalJQOnce.apply($(selector, context), [id]);
-    return drupalOnce(id, selector, context);
-  }
-
-  function remove(id, selector, context) {
-    originalJQRemoveOnce.apply($(selector, context), [id]);
-    return drupalOnce.remove(id, selector, context);
-  }
-
-  window.once = Object.assign(augmentedOnce, drupalOnce, {
-    remove
-  });
-})(jQuery, once);
\ No newline at end of file
diff --git a/core/modules/block/block.libraries.yml b/core/modules/block/block.libraries.yml
index b67d33870834bef..ad6f33b10567297 100644
--- a/core/modules/block/block.libraries.yml
+++ b/core/modules/block/block.libraries.yml
@@ -6,7 +6,6 @@ drupal.block:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
 
 drupal.block.admin:
   version: VERSION
@@ -23,4 +22,3 @@ drupal.block.admin:
     - core/drupal.dialog.ajax
     - core/drupal.string.includes
     - core/once
-    - core/jquery.once.bc
diff --git a/core/modules/ckeditor/ckeditor.libraries.yml b/core/modules/ckeditor/ckeditor.libraries.yml
index fc90f6a4babf255..48bb5e473576db3 100644
--- a/core/modules/ckeditor/ckeditor.libraries.yml
+++ b/core/modules/ckeditor/ckeditor.libraries.yml
@@ -50,7 +50,6 @@ drupal.ckeditor.admin:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
     - core/backbone
     - core/drupal.dialog
     - core/drupal.announce
@@ -68,7 +67,6 @@ drupal.ckeditor.drupalimage.admin:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
     - core/drupal.vertical-tabs
     - core/drupalSettings
 
diff --git a/core/modules/color/color.libraries.yml b/core/modules/color/color.libraries.yml
index 6271193aead3c24..860c0c165253a19 100644
--- a/core/modules/color/color.libraries.yml
+++ b/core/modules/color/color.libraries.yml
@@ -6,7 +6,6 @@ drupal.color:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
     - core/jquery.farbtastic
     - color/drupal.color.preview
 
@@ -19,7 +18,6 @@ drupal.color.preview:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
 
 admin:
   version: VERSION
diff --git a/core/modules/comment/comment.libraries.yml b/core/modules/comment/comment.libraries.yml
index 3ecdcf4cbdec5a7..25c815116197ccc 100644
--- a/core/modules/comment/comment.libraries.yml
+++ b/core/modules/comment/comment.libraries.yml
@@ -23,7 +23,6 @@ drupal.comment-new-indicator:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - history/api
     - core/drupal.displace
@@ -35,6 +34,5 @@ drupal.node-new-comments-link:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - history/api
diff --git a/core/modules/content_translation/content_translation.libraries.yml b/core/modules/content_translation/content_translation.libraries.yml
index 96043efe63d2b85..3857be167e7e849 100644
--- a/core/modules/content_translation/content_translation.libraries.yml
+++ b/core/modules/content_translation/content_translation.libraries.yml
@@ -9,4 +9,3 @@ drupal.content_translation.admin:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
diff --git a/core/modules/contextual/contextual.libraries.yml b/core/modules/contextual/contextual.libraries.yml
index 30961b1ed4af7b7..3a5918f7e15532f 100644
--- a/core/modules/contextual/contextual.libraries.yml
+++ b/core/modules/contextual/contextual.libraries.yml
@@ -25,7 +25,6 @@ drupal.contextual-links:
     - core/backbone
     - core/modernizr
     - core/once
-    - core/jquery.once.bc
 
 drupal.contextual-toolbar:
   version: VERSION
@@ -44,6 +43,5 @@ drupal.contextual-toolbar:
     - core/drupal
     - core/backbone
     - core/once
-    - core/jquery.once.bc
     - core/drupal.tabbingmanager
     - core/drupal.announce
diff --git a/core/modules/editor/editor.libraries.yml b/core/modules/editor/editor.libraries.yml
index 0aaa04bc476a370..20678413309f93f 100644
--- a/core/modules/editor/editor.libraries.yml
+++ b/core/modules/editor/editor.libraries.yml
@@ -5,7 +5,6 @@ drupal.editor.admin:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/underscore
 
@@ -18,7 +17,6 @@ drupal.editor:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
     - core/drupal.dialog
 
 drupal.editor.dialog:
diff --git a/core/modules/field_ui/field_ui.libraries.yml b/core/modules/field_ui/field_ui.libraries.yml
index 432a5d3788c7d6a..8db10f6e91de138 100644
--- a/core/modules/field_ui/field_ui.libraries.yml
+++ b/core/modules/field_ui/field_ui.libraries.yml
@@ -10,4 +10,3 @@ drupal.field_ui:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
diff --git a/core/modules/file/file.libraries.yml b/core/modules/file/file.libraries.yml
index fcc594ae424ea1c..81c9324ea536626 100644
--- a/core/modules/file/file.libraries.yml
+++ b/core/modules/file/file.libraries.yml
@@ -5,6 +5,5 @@ drupal.file:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/drupalSettings
diff --git a/core/modules/filter/filter.libraries.yml b/core/modules/filter/filter.libraries.yml
index 341189f8c754d27..f3ad11443411ae5 100644
--- a/core/modules/filter/filter.libraries.yml
+++ b/core/modules/filter/filter.libraries.yml
@@ -6,7 +6,6 @@ drupal.filter.admin:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
     - core/drupal.form
 
 drupal.filter.filter_html.admin:
@@ -16,7 +15,6 @@ drupal.filter.filter_html.admin:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/underscore
 
 drupal.filter:
@@ -27,7 +25,6 @@ drupal.filter:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
 
 caption:
   version: VERSION
diff --git a/core/modules/language/language.libraries.yml b/core/modules/language/language.libraries.yml
index c75a3e491989374..0e7ff2c3d0d6e6f 100644
--- a/core/modules/language/language.libraries.yml
+++ b/core/modules/language/language.libraries.yml
@@ -9,4 +9,3 @@ drupal.language.admin:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
diff --git a/core/modules/locale/locale.libraries.yml b/core/modules/locale/locale.libraries.yml
index 6e5c0f30e131118..fb06e81ff6c72a1 100644
--- a/core/modules/locale/locale.libraries.yml
+++ b/core/modules/locale/locale.libraries.yml
@@ -10,7 +10,6 @@ drupal.locale.admin:
     - core/drupal
     - core/drupal.form
     - core/once
-    - core/jquery.once.bc
 
 translations:
   # No sensible version can be specified, since the translations may change at
diff --git a/core/modules/media_library/media_library.libraries.yml b/core/modules/media_library/media_library.libraries.yml
index 8c2f1b393a0af47..6fd4144e6cb8e61 100644
--- a/core/modules/media_library/media_library.libraries.yml
+++ b/core/modules/media_library/media_library.libraries.yml
@@ -34,7 +34,6 @@ ui:
     - core/drupal.announce
     - core/drupal.nodelist.foreach
     - core/once
-    - core/jquery.once.bc
     - core/jquery
     - media_library/view
     - core/tabbable
diff --git a/core/modules/node/node.libraries.yml b/core/modules/node/node.libraries.yml
index d599c2aa1816513..9af36335b41435f 100644
--- a/core/modules/node/node.libraries.yml
+++ b/core/modules/node/node.libraries.yml
@@ -19,7 +19,6 @@ drupal.node.preview:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/drupal.dialog
     - core/drupal.form
diff --git a/core/modules/quickedit/quickedit.libraries.yml b/core/modules/quickedit/quickedit.libraries.yml
index 64c4908a312d29e..1169abbd300d3eb 100644
--- a/core/modules/quickedit/quickedit.libraries.yml
+++ b/core/modules/quickedit/quickedit.libraries.yml
@@ -29,7 +29,6 @@ quickedit:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/underscore
     - core/backbone
     - core/jquery.form
diff --git a/core/modules/settings_tray/settings_tray.libraries.yml b/core/modules/settings_tray/settings_tray.libraries.yml
index 0f6fed6b556f2c9..de1494c7f69821f 100644
--- a/core/modules/settings_tray/settings_tray.libraries.yml
+++ b/core/modules/settings_tray/settings_tray.libraries.yml
@@ -16,5 +16,4 @@ drupal.settings_tray:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
     - core/drupal.ajax
diff --git a/core/modules/system/system.libraries.yml b/core/modules/system/system.libraries.yml
index 7ccd963b8ebc677..7f77a406f2892ca 100644
--- a/core/modules/system/system.libraries.yml
+++ b/core/modules/system/system.libraries.yml
@@ -52,7 +52,6 @@ drupal.system:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
 
 drupal.system.modules:
   version: VERSION
@@ -64,7 +63,6 @@ drupal.system.modules:
     - core/drupal.debounce
     - core/drupal.nodelist.foreach
     - core/once
-    - core/jquery.once.bc
     - core/drupal.announce
 
 diff:
@@ -83,5 +81,4 @@ drupal.system.date:
     - core/drupal.nodelist.foreach
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
     - core/drupal.form
diff --git a/core/modules/system/tests/modules/js_once_test/js_once_test.routing.yml b/core/modules/system/tests/modules/js_once_test/js_once_test.routing.yml
index c73a876b3ae6a7d..1045da862d8b89d 100644
--- a/core/modules/system/tests/modules/js_once_test/js_once_test.routing.yml
+++ b/core/modules/system/tests/modules/js_once_test/js_once_test.routing.yml
@@ -5,10 +5,3 @@ js_once_test:
     _title: 'OnceTest'
   requirements:
     _access: 'TRUE'
-js_once_test.with_bc:
-  path: '/js_once_with_bc_test'
-  defaults:
-    _controller: '\Drupal\js_once_test\Controller\JsOnceTestController::onceBcTest'
-    _title: 'OnceBcTest'
-  requirements:
-    _access: 'TRUE'
diff --git a/core/modules/system/tests/modules/js_once_test/src/Controller/JsOnceTestController.php b/core/modules/system/tests/modules/js_once_test/src/Controller/JsOnceTestController.php
index c47505cd3bba5dc..f35a685695b52ba 100644
--- a/core/modules/system/tests/modules/js_once_test/src/Controller/JsOnceTestController.php
+++ b/core/modules/system/tests/modules/js_once_test/src/Controller/JsOnceTestController.php
@@ -32,27 +32,4 @@ class JsOnceTestController extends ControllerBase {
     return $output;
   }
 
-  /**
-   * Provides elements for testing jQuery Once BC support.
-   *
-   * @return array
-   *   The render array.
-   */
-  public function onceBcTest() {
-    $output = [
-      '#attached' => ['library' => ['core/jquery.once']],
-    ];
-    foreach (range(1, 5) as $item) {
-      $output['item' . $item] = [
-        '#type' => 'html_tag',
-        '#tag' => 'div',
-        '#value' => 'Item ' . $item,
-        '#attributes' => [
-          'data-drupal-item' => $item,
-        ],
-      ];
-    }
-    return $output;
-  }
-
 }
diff --git a/core/modules/text/text.libraries.yml b/core/modules/text/text.libraries.yml
index 8e7d26f8e21421a..ebcfd3ab88b689f 100644
--- a/core/modules/text/text.libraries.yml
+++ b/core/modules/text/text.libraries.yml
@@ -5,5 +5,4 @@ drupal.text:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
diff --git a/core/modules/toolbar/toolbar.libraries.yml b/core/modules/toolbar/toolbar.libraries.yml
index e4f7c2d156c93f8..d8140142d704365 100644
--- a/core/modules/toolbar/toolbar.libraries.yml
+++ b/core/modules/toolbar/toolbar.libraries.yml
@@ -26,7 +26,6 @@ toolbar:
     - core/drupal.announce
     - core/backbone
     - core/once
-    - core/jquery.once.bc
     - core/drupal.displace
     - toolbar/toolbar.menu
 
@@ -41,7 +40,6 @@ toolbar.menu:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
 
 toolbar.escapeAdmin:
   version: VERSION
@@ -52,4 +50,3 @@ toolbar.escapeAdmin:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
diff --git a/core/modules/tour/tour.libraries.yml b/core/modules/tour/tour.libraries.yml
index cef41779c9c804a..f8f717b019f3bf3 100644
--- a/core/modules/tour/tour.libraries.yml
+++ b/core/modules/tour/tour.libraries.yml
@@ -5,7 +5,6 @@ tour:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/backbone
     - core/shepherd
diff --git a/core/modules/user/user.libraries.yml b/core/modules/user/user.libraries.yml
index e4971f98dab798e..0aecebe91648b91 100644
--- a/core/modules/user/user.libraries.yml
+++ b/core/modules/user/user.libraries.yml
@@ -10,7 +10,6 @@ drupal.user:
     - core/jquery
     - core/drupal
     - core/once
-    - core/jquery.once.bc
 
 drupal.user.admin:
   version: VERSION
@@ -25,7 +24,6 @@ drupal.user.permissions:
   dependencies:
     - core/jquery
     - core/once
-    - core/jquery.once.bc
     - core/drupal
     - core/drupalSettings
     - user/drupal.user.admin
diff --git a/core/modules/views/views.libraries.yml b/core/modules/views/views.libraries.yml
index fe13adfc36aac3e..fe5827f2ee2a64c 100644
--- a/core/modules/views/views.libraries.yml
+++ b/core/modules/views/views.libraries.yml
@@ -14,6 +14,5 @@ views.ajax:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
     - core/jquery.form
     - core/drupal.ajax
diff --git a/core/modules/views_ui/views_ui.libraries.yml b/core/modules/views_ui/views_ui.libraries.yml
index 086f6917302590d..6f812d07c60fc25 100644
--- a/core/modules/views_ui/views_ui.libraries.yml
+++ b/core/modules/views_ui/views_ui.libraries.yml
@@ -9,7 +9,6 @@ views_ui.admin:
     - core/drupal
     - core/drupalSettings
     - core/once
-    - core/jquery.once.bc
     - core/jquery.form
     - core/drupal.form
     - core/drupal.ajax
@@ -27,7 +26,6 @@ views_ui.listing:
     - core/drupal
     - core/drupal.string.includes
     - core/once
-    - core/jquery.once.bc
     - views_ui/admin.styling
 
 admin.styling:
diff --git a/core/package.json b/core/package.json
index 43e9f43997e7c8d..e731df1a9198c5d 100644
--- a/core/package.json
+++ b/core/package.json
@@ -83,7 +83,6 @@
     "glob": "^7.1.2",
     "jquery": "^3.6.0",
     "jquery-form": "^4.3.0",
-    "jquery-once": "^2.2.3",
     "jquery-ui": "~1.13.1",
     "js-cookie": "^3.0.1",
     "jsdom": "^18.0.1",
diff --git a/core/scripts/js/vendor-update.js b/core/scripts/js/vendor-update.js
index 19b0b660fb9c91e..e74473f166a155e 100644
--- a/core/scripts/js/vendor-update.js
+++ b/core/scripts/js/vendor-update.js
@@ -122,11 +122,6 @@ const assetsFolder = `${coreFolder}/assets/vendor`;
         { from: 'src/jquery.form.js', to: 'src/jquery.form.js' },
       ],
     },
-    {
-      pack: 'jquery-once',
-      library: 'jquery.once',
-      files: ['jquery.once.js', 'jquery.once.min.js', 'jquery.once.min.js.map'],
-    },
     {
       pack: 'js-cookie',
       files: [{ from: 'dist/js.cookie.min.js', to: 'js.cookie.min.js' }],
diff --git a/core/tests/Drupal/Nightwatch/Tests/jsOnceTest.js b/core/tests/Drupal/Nightwatch/Tests/jsOnceTest.js
index b1f4a715352ddca..9e8a7476f3074de 100644
--- a/core/tests/Drupal/Nightwatch/Tests/jsOnceTest.js
+++ b/core/tests/Drupal/Nightwatch/Tests/jsOnceTest.js
@@ -132,79 +132,4 @@ module.exports = {
       )
       .drupalLogAndEnd({ onlyOnError: false });
   },
-  'Test BC layer with jQuery Once calls': (browser) => {
-    browser
-      .drupalRelativeURL('/js_once_with_bc_test')
-      .waitForElementVisible('[data-drupal-item]', 1000)
-      // prettier-ignore
-      .execute(
-        function () {
-          // A core script calls once on some elements.
-          once('js_once_test', '[data-drupal-item]');
-          // A contrib module not yet using @drupal/once calls jQuery Once.
-          return jQuery('[data-drupal-item]').once('js_once_test');
-        },
-        (result) => {
-          browser.assert.strictEqual(
-            result.value.length,
-            0,
-            'Calls to once() are taken into account when using jQuery.once()',
-          );
-        },
-      )
-      // Once calls don't take into account calls to jQuery.once by design.
-      .execute(
-        function () {
-          // Calling jQuery.once before @drupal/once will lead to duplicate
-          // processing.
-          jQuery('[data-drupal-item]').once('js_once_test_extra');
-          // A core script calls once on some elements.
-          return once('js_once_test_extra', '[data-drupal-item]');
-        },
-        (result) => {
-          browser.assert.strictEqual(
-            result.value.length,
-            5,
-            '5 items returned by once() after a call to jQuery.once()',
-          );
-        },
-      )
-      .execute(
-        function () {
-          once('js_once_test_remove', '[data-drupal-item]');
-          // A core script calls once on some elements.
-          once.remove('js_once_test_remove', '[data-drupal-item]');
-          // A contrib module not yet using @drupal/once calls the jQuery Once
-          // remove() function.
-          return jQuery('[data-drupal-item]').removeOnce('js_once_test_remove');
-        },
-        (result) => {
-          browser.assert.strictEqual(
-            result.value.length,
-            0,
-            'Calls to once.remove() are taken into account when using jQuery.removeOnce()',
-          );
-        },
-      )
-      // Once.remove calls don't take into account calls to jQuery.removeOnce by
-      // design.
-      .execute(
-        function () {
-          once('js_once_test_remove_fail', '[data-drupal-item]');
-          // Calling jQuery.removeOnce before @drupal/once will lead to
-          // duplicate processing.
-          jQuery('[data-drupal-item]').removeOnce('js_once_test_remove_fail');
-          // A core script calls once.remove on some elements.
-          return once.remove('js_once_test_remove_fail', '[data-drupal-item]');
-        },
-        (result) => {
-          browser.assert.strictEqual(
-            result.value.length,
-            5,
-            '5 items returned by once.remove() after a call to jQuery.removeOnce()',
-          );
-        },
-      )
-      .drupalLogAndEnd({ onlyOnError: false });
-  },
 };
diff --git a/core/yarn.lock b/core/yarn.lock
index 249e9f5502a8bb5..a2aba13f6529336 100644
--- a/core/yarn.lock
+++ b/core/yarn.lock
@@ -5034,13 +5034,6 @@ jquery-form@^4.3.0:
   dependencies:
     jquery ">=1.7.2"
 
-jquery-once@^2.2.3:
-  version "2.2.3"
-  resolved "https://registry.yarnpkg.com/jquery-once/-/jquery-once-2.2.3.tgz#d5b266a1a7b47e5f86a5f25e83ee9467e13707a3"
-  integrity sha512-5gbkmxjbqA15KbrNxcDhdBN3EvakY5w/JdxdGgPGsO/kp6TdiqOr6nbnEZGeyF1/yLXVvA8i9lisgXguSiNV+g==
-  dependencies:
-    jquery "*"
-
 jquery-ui@~1.13.1:
   version "1.13.1"
   resolved "https://registry.yarnpkg.com/jquery-ui/-/jquery-ui-1.13.1.tgz#d0b7a42e73a04c31bb5706adf86f6f8942f64eaa"
@@ -5048,7 +5041,7 @@ jquery-ui@~1.13.1:
   dependencies:
     jquery ">=1.8.0 <4.0.0"
 
-jquery@*, jquery@>=1.7.2, "jquery@>=1.8.0 <4.0.0", jquery@^3.6.0:
+jquery@>=1.7.2, "jquery@>=1.8.0 <4.0.0", jquery@^3.6.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/jquery/-/jquery-3.6.0.tgz#c72a09f15c1bdce142f49dbf1170bdf8adac2470"
   integrity sha512-JVzAR/AjBvVt2BmYhxRCSYysDsPcssdmTFnzyLEts9qNwmjmu4JTAMYubEfwVOSwpQ1I1sKKFcxhZCI2buerfw==