Issue #3337216: DI problems

src/Controller/AjaxController.php

@@ -21,7 +21,6 @@ use Drupal\private_message\Ajax\PrivateMessageInsertThreadCommand;
 use Drupal\private_message\Ajax\PrivateMessageMemberUsernameValidatedCommand;
 use Drupal\private_message\Ajax\PrivateMessageMembersAutocompleteResponseCommand;
 use Drupal\private_message\Ajax\PrivateMessageUpdateUnreadItemsCountCommand;
-use Drupal\private_message\Entity\PrivateMessageThread;
 use Drupal\private_message\Service\PrivateMessageBanManagerInterface;
 use Drupal\private_message\Service\PrivateMessageServiceInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;