diff --git a/core/modules/file/css/file.admin.css b/core/modules/file/css/file.admin.css
deleted file mode 100644
index 6a45644c02da..000000000000
--- a/core/modules/file/css/file.admin.css
+++ /dev/null
@@ -1,18 +0,0 @@
-/**
- * @file
- * Admin stylesheet for file module.
- */
-
-/* File upload widget.*/
-.form-managed-file .form-submit {
-  margin: 0 0.5em;
-}
-.form-managed-file div.ajax-progress-bar {
-  display: none;
-  margin-top: 4px;
-  padding: 0;
-  width: 28em;
-}
-.form-managed-file .ajax-progress-bar .bar {
-  margin: 0;
-}
diff --git a/core/modules/file/file.libraries.yml b/core/modules/file/file.libraries.yml
index ccc0c3b95a6c..def38d9617e3 100644
--- a/core/modules/file/file.libraries.yml
+++ b/core/modules/file/file.libraries.yml
@@ -2,9 +2,6 @@ drupal.file:
   version: VERSION
   js:
     file.js: {}
-  css:
-    theme:
-      css/file.admin.css: {}
   dependencies:
     - core/jquery
     - core/jquery.once