Don't change the filecache schema on update

Signed-off-by: Joas Schilling <coding@schilljs.com>

core/Migrations/Version13000Date20170926101637.php

@@ -22,15 +22,15 @@ class Version13000Date20170926101637 extends BigIntMigration {
 			'authtoken' => ['id'],
 			'bruteforce_attempts' => ['id'],
 			'comments' => ['id', 'parent_id', 'topmost_parent_id'],
-			'filecache' => ['fileid', 'storage', 'parent', 'mimetype', 'mimepart'],
+			// Disabled for now 'filecache' => ['fileid', 'storage', 'parent', 'mimetype', 'mimepart'],
 			'file_locks' => ['id'],
 			'jobs' => ['id'],
-			'mimetypes' => ['id'],
+			// Disabled for now 'mimetypes' => ['id'],
 			'mounts' => ['id'],
 			'personal_settings' => ['id'],
 			'properties' => ['id'],
 			'share' => ['id', 'parent', 'file_source'],
-			'storages' => ['numeric_id'],
+			// Disabled for now 'storages' => ['numeric_id'],
 			'systemtag' => ['id'],
 			'systemtag_group' => ['systemtagid'],
 			'systemtag_object_mapping' => ['systemtagid'],