[HttpKernel] removed obsolete code

src/Symfony/Component/HttpKernel/HttpCache/HttpCache.php

@@ -117,16 +117,6 @@ class HttpCache implements HttpKernelInterface
         return implode('; ', $log);
     }
 
-    /**
-     * Gets the Request instance associated with the master request.
-     *
-     * @return Symfony\Component\HttpFoundation\Request A Request instance
-     */
-    public function getRequest()
-    {
-        return $this->request;
-    }
-
     /**
      * {@inheritdoc}
      */