Merge branch '4.4'

* 4.4:
  [4.3] Remove unused local variables

Author: nicolas-grekas

Tests/FirewallTest.php

@@ -12,7 +12,6 @@
 namespace Symfony\Component\Security\Http\Tests;
 
 use PHPUnit\Framework\TestCase;
-use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Event\RequestEvent;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
 use Symfony\Component\Security\Http\Firewall;
@@ -48,8 +47,6 @@ public function testOnKernelRequestRegistersExceptionListener()
 
     public function testOnKernelRequestStopsWhenThereIsAResponse()
     {
-        $response = new Response();
-
         $called = [];
 
         $first = function () use (&$called) {