Update PluginManager.php

Author: LukeTowers

modules/system/classes/PluginManager.php

@@ -7,7 +7,6 @@
 use Illuminate\Database\QueryException;
 use Illuminate\Support\Facades\App;
 use Illuminate\Support\Facades\Cache;
-use Illuminate\Support\Facades\DB;
 use Illuminate\Support\Facades\Lang;
 use Illuminate\Support\Facades\Log;
 use Illuminate\Support\Facades\View;