Refactor namespaces

- Remove unused use statements
- Add required use statements
- Escape global classes

src/Object/Image.php

@@ -12,7 +12,6 @@ use Friendica\Core\L10n;
 use Friendica\Core\Logger;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
-use Friendica\Model\Contact;
 use Friendica\Model\Photo;
 use Friendica\Util\Network;
 use Exception;