perf: remove needless check for changed storage id for mounts

since we already know they have the same root_id, the storage_id must also be the same

Signed-off-by: Robin Appelman <robin@icewind.nl>

Author: icewind1991

lib/private/Files/Config/UserMountCache.php

@@ -149,12 +149,12 @@ public function registerMounts(IUser $user, array $mounts, ?array $mountProvider
 	private function findChangedMounts(array $newMounts, array $cachedMounts): array {
 		$changed = [];
 		foreach ($cachedMounts as $key => $cachedMount) {
+			// $key = "$rootId::$mountPoint"
 			if (isset($newMounts[$key])) {
 				$newMount = $newMounts[$key];
 				if (
 					$newMount->getMountId() !== $cachedMount->getMountId()
 					|| $newMount->getMountProvider() !== $cachedMount->getMountProvider()
-					|| $newMount->getStorageId() !== $cachedMount->getStorageId()
 				) {
 					$changed[] = [$cachedMount, $newMount];
 				}