Revert "Issue #3022910 by quietone, juampynr, chandrashekhar_srijan, alisonjo315, heddn, benjifisher: Prevent migrated files from having an incorrect value at file_managed.filename"

This reverts commit 286129f86e.

core/modules/file/migrations/d7_file.yml

@@ -19,14 +19,7 @@ process:
   # If you are using this file to build a custom migration consider removing
   # the fid field to allow incremental migrations.
   fid: fid
-  # File entity module uses file_managed.filename as the entity title, while
-  # Drupal 8 expects this to be an actual file name. Therefore, extract the
-  # filename from the uri field. Otherwise, the file will migrate but form
-  # validation won't pass when editing it.
-  filename:
-    plugin: callback
-    callable: basename
-    source: uri
+  filename: filename
   source_full_path:
     -
       plugin: concat

core/modules/file/migrations/d7_file_private.yml

@@ -17,14 +17,7 @@ process:
   # If you are using this file to build a custom migration consider removing
   # the fid field to allow incremental migrations.
   fid: fid
-  # File entity module uses file_managed.filename as the entity title, while
-  # Drupal 8 expects this to be an actual file name. Therefore, extract the
-  # filename from the uri field. Otherwise, the file will migrate but form
-  # validation won't pass when editing it.
-  filename:
-    plugin: callback
-    callable: basename
-    source: uri
+  filename: filename
   source_full_path:
     -
       plugin: concat

core/modules/file/tests/modules/file_test_get_ids/migrations/d7_file_used.yml

@@ -9,14 +9,7 @@ source:
     source_base_path: ''
 process:
   fid: fid
-  # File entity module uses file_managed.filename as the entity title, while
-  # Drupal 8 expects this to be an actual file name. Therefore, extract the
-  # filename from the uri field. Otherwise, the file will migrate but form
-  # validation won't pass when editing it.
-  filename:
-    plugin: callback
-    callable: basename
-    source: uri
+  filename: filename
   source_full_path:
     -
       plugin: concat

core/modules/file/tests/src/Kernel/Migrate/d7/MigrateFileTest.php

@@ -24,10 +24,6 @@ class MigrateFileTest extends MigrateDrupal7TestBase {
    */
   protected function setUp(): void {
     parent::setUp();
-    $this->sourceDatabase->update('file_managed')
-      ->fields(['filename' => 'this can have spaces in it'])
-      ->condition('fid', 1)
-      ->execute();
     $this->fileMigrationSetup();
   }
 

core/modules/file/tests/src/Kernel/Migrate/d7/MigratePrivateFileTest.php

@@ -24,10 +24,6 @@ class MigratePrivateFileTest extends MigrateDrupal7TestBase {
    */
   protected function setUp(): void {
     parent::setUp();
-    $this->sourceDatabase->update('file_managed')
-      ->fields(['filename' => 'this can have spaces in it'])
-      ->condition('fid', 3)
-      ->execute();
     $this->setSetting('file_private_path', $this->container->getParameter('site.path') . '/private');
     $this->fileMigrationSetup();
   }