fix(filesystem): Fix type hinting in Filesystem

Signed-off-by: Carl Schwan <carl.schwan@nextcloud.com>

Author: CarlSchwan

build/psalm-baseline.xml

@@ -3832,18 +3832,6 @@
       <code><![CDATA[array{int, string, int}]]></code>
     </MoreSpecificReturnType>
   </file>
-  <file src="lib/private/Files/Filesystem.php">
-    <LessSpecificReturnStatement>
-      <code><![CDATA[$mount->getStorage()]]></code>
-      <code><![CDATA[self::getMountManager()->findByNumericId($id)]]></code>
-      <code><![CDATA[self::getMountManager()->findByStorageId($id)]]></code>
-    </LessSpecificReturnStatement>
-    <MoreSpecificReturnType>
-      <code><![CDATA[Mount\MountPoint[]]]></code>
-      <code><![CDATA[Mount\MountPoint[]]]></code>
-      <code><![CDATA[\OC\Files\Storage\Storage|null]]></code>
-    </MoreSpecificReturnType>
-  </file>
   <file src="lib/private/Files/Mount/MountPoint.php">
     <UndefinedInterfaceMethod>
       <code><![CDATA[wrap]]></code>

lib/private/Files/Filesystem.php

@@ -246,7 +246,7 @@ public static function getMountPoints($path) {
 	 * get the storage mounted at $mountPoint
 	 *
 	 * @param string $mountPoint
-	 * @return \OC\Files\Storage\Storage|null
+	 * @return \OCP\Files\Storage\IStorage|null
 	 */
 	public static function getStorage($mountPoint) {
 		$mount = self::getMountManager()->find($mountPoint);
@@ -255,15 +255,15 @@ public static function getStorage($mountPoint) {
 
 	/**
 	 * @param string $id
-	 * @return Mount\MountPoint[]
+	 * @return \OCP\Files\Mount\IMountPoint[]
 	 */
 	public static function getMountByStorageId($id) {
 		return self::getMountManager()->findByStorageId($id);
 	}
 
 	/**
 	 * @param int $id
-	 * @return Mount\MountPoint[]
+	 * @return \OCP\Files\Mount\IMountPoint[]
 	 */
 	public static function getMountByNumericId($id) {
 		return self::getMountManager()->findByNumericId($id);