fix(collaboration): Remove unnecessary check on NodeDeletedEvent

Signed-off-by: Louis Chmn <[email protected]>

Author: artonge

lib/private/Collaboration/Reference/File/FileReferenceEventListener.php

@@ -38,10 +38,6 @@ public static function register(IEventDispatcher $eventDispatcher): void {
 	 */
 	public function handle(Event $event): void {
 		if ($event instanceof NodeDeletedEvent) {
-			if ($event->getNode() instanceof NonExistingFolder || $event->getNode() instanceof NonExistingFile) {
-				return;
-			}
-
 			$this->manager->invalidateCache((string)$event->getNode()->getId());
 		}
 		if ($event instanceof NodeRenamedEvent) {