removed unecessary use statements (ExceptionEvent was also undefined namespace)

src/Symfony/Component/Security/Http/Authorization/AccessDeniedHandlerInterface.php

@@ -3,9 +3,7 @@
 namespace Symfony\Component\Security\Http\Authorization;
 
 use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpKernel\Event\ExceptionEvent;
 use Symfony\Component\Security\Core\Exception\AccessDeniedException;
-use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
 
 /**
  * This is used by the ExceptionListener to translate an AccessDeniedException