Merge branch '5.2' into 5.x

* 5.2:
  remove namespace unused

Author: javiereguiluz

security/user_checkers.rst

@@ -24,7 +24,6 @@ displayed to the user::
     namespace App\Security;
 
     use App\Entity\User as AppUser;
-    use App\Exception\AccountDeletedException;
     use Symfony\Component\Security\Core\Exception\AccountExpiredException;
     use Symfony\Component\Security\Core\Exception\CustomUserMessageAccountStatusException;
     use Symfony\Component\Security\Core\User\UserCheckerInterface;