ISTWCMS-5544 Refactor add a warning message when deleting content

ISTWCMS-5544 Refactor using OO way to add a warning message when deleting content

src/EventSubscriber/UwDeleteFormEventSubscriber.php

@@ -33,16 +33,6 @@ class UwDeleteFormEventSubscriber implements EventSubscriberInterface {
     $this->currentUser = $currentUser;
   }
 
-  /**
-   * {@inheritdoc}
-   */
-  public static function create(ContainerInterface $container) {
-    // Instantiates this form class.
-    return new static(
-      $container->get('current_user'),
-    );
-  }
-
   /**
    * {@inheritdoc}
    */