Update use statement lists with new Friendica\Database\dba class

- Remove unused use statement
- Remove superfluous use statements (classes in the same namespace)
- Add missing use statements

src/Module/Magic.php

@@ -5,12 +5,11 @@
 namespace Friendica\Module;
 
 use Friendica\BaseModule;
+use Friendica\Database\dba;
 use Friendica\Model\Contact;
 use Friendica\Util\HTTPSignature;
 use Friendica\Util\Network;
 
-use dba;
-
 /**
  * Magic Auth (remote authentication) module.
  *