.../modules/ckeditor5/src/Plugin/CKEditor5Plugin/CodeBlock.php | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/CodeBlock.php b/core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/CodeBlock.php
index 22545f0e26..e21b3a7ef6 100644
--- a/core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/CodeBlock.php
+++ b/core/modules/ckeditor5/src/Plugin/CKEditor5Plugin/CodeBlock.php
@@ -7,7 +7,6 @@
 use Drupal\ckeditor5\Plugin\CKEditor5PluginConfigurableTrait;
 use Drupal\ckeditor5\Plugin\CKEditor5PluginDefault;
 use Drupal\ckeditor5\Plugin\CKEditor5PluginConfigurableInterface;
-use Drupal\ckeditor5\Plugin\CKEditor5PluginElementsSubsetInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\editor\EditorInterface;
 
@@ -17,7 +16,7 @@
  * @internal
  *   Plugin classes are internal.
  */
-class CodeBlock extends CKEditor5PluginDefault implements CKEditor5PluginConfigurableInterface, CKEditor5PluginElementsSubsetInterface {
+class CodeBlock extends CKEditor5PluginDefault implements CKEditor5PluginConfigurableInterface {
 
   use CKEditor5PluginConfigurableTrait;
 
@@ -129,13 +128,6 @@ public function defaultConfiguration() {
     ];
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public function getElementsSubset(): array {
-    return array_column($this->configuration['languages'], 'language');
-  }
-
   /**
    * {@inheritdoc}
    */