Refactor namespaces

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

src/Module/Proxy.php

@@ -5,15 +5,11 @@
  */
 namespace Friendica\Module;
 
-use Friendica\App;
 use Friendica\BaseModule;
-use Friendica\Core\Config;
 use Friendica\Core\L10n;
 use Friendica\Core\System;
-use Friendica\Database\DBA;
 use Friendica\Model\Photo;
 use Friendica\Object\Image;
-use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 use Friendica\Util\Proxy as ProxyUtils;