Refactor namespaces

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

src/Model/Item.php

@@ -20,15 +20,6 @@ use Friendica\Core\Renderer;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
 use Friendica\Database\DBA;
-use Friendica\Model\Contact;
-use Friendica\Model\Event;
-use Friendica\Model\FileTag;
-use Friendica\Model\PermissionSet;
-use Friendica\Model\Term;
-use Friendica\Model\ItemURI;
-use Friendica\Model\Photo;
-use Friendica\Model\Attach;
-use Friendica\Object\Image;
 use Friendica\Protocol\Diaspora;
 use Friendica\Protocol\OStatus;
 use Friendica\Util\DateTimeFormat;