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diff --git a/web/core/modules/layout_builder/src/Form/AjaxFormHelperTrait.php b/web/core/modules/layout_builder/src/Form/AjaxFormHelperTrait.php
deleted file mode 100644
index a5a387020..000000000
--- a/web/core/modules/layout_builder/src/Form/AjaxFormHelperTrait.php
+++ /dev/null
@@ -1,61 +0,0 @@
-<?php
-
-namespace Drupal\layout_builder\Form;
-
-use Drupal\Core\Ajax\AjaxResponse;
-use Drupal\Core\Ajax\ReplaceCommand;
-use Drupal\Core\Form\FormStateInterface;
-use Drupal\layout_builder\Controller\AjaxHelperTrait;
-
-/**
- * Provides a helper to for submitting an AJAX form.
- *
- * @internal
- *
- * @todo Move to \Drupal\Core in https://www.drupal.org/node/2896535.
- */
-trait AjaxFormHelperTrait {
-
-  use AjaxHelperTrait;
-
-  /**
-   * Submit form dialog #ajax callback.
-   *
-   * @param array $form
-   *   An associative array containing the structure of the form.
-   * @param \Drupal\Core\Form\FormStateInterface $form_state
-   *   The current state of the form.
-   *
-   * @return \Drupal\Core\Ajax\AjaxResponse
-   *   An AJAX response that display validation error messages or represents a
-   *   successful submission.
-   */
-  public function ajaxSubmit(array &$form, FormStateInterface $form_state) {
-    if ($form_state->hasAnyErrors()) {
-      $form['status_messages'] = [
-        '#type' => 'status_messages',
-        '#weight' => -1000,
-      ];
-      $response = new AjaxResponse();
-      $response->addCommand(new ReplaceCommand('[data-drupal-selector="' . $form['#attributes']['data-drupal-selector'] . '"]', $form));
-    }
-    else {
-      $response = $this->successfulAjaxSubmit($form, $form_state);
-    }
-    return $response;
-  }
-
-  /**
-   * Allows the form to respond to a successful AJAX submission.
-   *
-   * @param array $form
-   *   An associative array containing the structure of the form.
-   * @param \Drupal\Core\Form\FormStateInterface $form_state
-   *   The current state of the form.
-   *
-   * @return \Drupal\Core\Ajax\AjaxResponse
-   *   An AJAX response.
-   */
-  abstract protected function successfulAjaxSubmit(array $form, FormStateInterface $form_state);
-
-}