Removed unnecessary getDefinition() call.

Author: derrabus

src/Symfony/Component/EventDispatcher/DependencyInjection/RegisterListenersPass.php

@@ -62,8 +62,6 @@ public function process(ContainerBuilder $container)
         $definition = $container->findDefinition($this->dispatcherService);
 
         foreach ($container->findTaggedServiceIds($this->listenerTag, true) as $id => $events) {
-            $def = $container->getDefinition($id);
-
             foreach ($events as $event) {
                 $priority = isset($event['priority']) ? $event['priority'] : 0;