Apply fixes from StyleCI (pterodactyl#416)

Author: DaneEveritt

app/Models/ServiceOption.php

@@ -138,6 +138,6 @@ public function packs()
 
     public function copyFrom()
     {
-        return $this->belongsTo(ServiceOption::class, 'copy_script_from');
+        return $this->belongsTo(self::class, 'copy_script_from');
     }
 }

app/Repositories/UserRepository.php

@@ -28,7 +28,6 @@
 use DB;
 use Auth;
 use Hash;
-use Carbon;
 use Settings;
 use Validator;
 use Pterodactyl\Models;