Merge branch '4.3' into 4.4

* 4.3:
  [4.3] Remove unused local variables

Author: nicolas-grekas

Http/Tests/FirewallTest.php

@@ -14,7 +14,6 @@
 use PHPUnit\Framework\TestCase;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 use Symfony\Component\HttpFoundation\Request;
-use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\RequestEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Security\Http\Firewall;
@@ -52,8 +51,6 @@ public function testOnKernelRequestRegistersExceptionListener()
 
     public function testOnKernelRequestStopsWhenThereIsAResponse()
     {
-        $response = new Response();
-
         $called = [];
 
         $first = function () use (&$called) {