Update DynamicRouter.php (#264)

Avoid deprecation message in Symfony 5.2

Author: Kolbasyatin

src/DynamicRouter.php

@@ -16,7 +16,6 @@
 use Symfony\Cmf\Component\Routing\Event\RouterGenerateEvent;
 use Symfony\Cmf\Component\Routing\Event\RouterMatchEvent;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
-use Symfony\Component\EventDispatcher\LegacyEventDispatcherProxy;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
 use Symfony\Component\Routing\Exception\ResourceNotFoundException;
@@ -106,10 +105,6 @@ public function __construct(
         $this->uriFilterRegexp = $uriFilterRegexp;
         $this->provider = $provider;
 
-        if (class_exists(LegacyEventDispatcherProxy::class)) {
-            $this->eventDispatcher = LegacyEventDispatcherProxy::decorate($eventDispatcher);
-        }
-
         $this->generator->setContext($context);
     }