Illegal use of server 3rdparty (symfony/event-dispatcher)

[nickvergessen]

This app is directly using classes of the symfony/event-dispatcher package in server. Please migrate to the official OCP wrappers.

[joshtrichards]

EventDispatcherInterface remedied in #2513.

Not sure if this is truly done. We still have the below:

groupfolders/lib/CacheListener.php

Lines 14 to 20 in e9db97d

	use Symfony\Component\EventDispatcher\EventDispatcher;
	class CacheListener {
	private EventDispatcher $eventDispatcher;
	public function __construct(EventDispatcher $eventDispatcher) {
	$this->eventDispatcher = $eventDispatcher;