Remove \ReflectionProperty::setAccessible(true) calls

Author: fancyweb

Debug/TraceableEventDispatcher.php

@@ -348,7 +348,6 @@ private function getListenersWithPriority(): array
         $result = [];
 
         $allListeners = new \ReflectionProperty(EventDispatcher::class, 'listeners');
-        $allListeners->setAccessible(true);
 
         foreach ($allListeners->getValue($this->dispatcher) as $eventName => $listenersByPriority) {
             foreach ($listenersByPriority as $priority => $listeners) {