userSession does not contain null

Signed-off-by: Git'Fellow <[email protected]>

Author: solracsf

apps/files_versions/lib/Listener/FileEventsListener.php

@@ -339,7 +339,7 @@ public function pre_renameOrCopy_hook(Node $source, Node $target): void {
 	 * If no user is connected, try to use the node's owner.
 	 */
 	private function getPathForNode(Node $node): ?string {
-		$user = $this->userSession?->getUser()?->getUID();
+		$user = $this->userSession->getUser()?->getUID();
 		if ($user) {
 			return $this->rootFolder
 				->getUserFolder($user)