Minor code improvements

app/Model/Config.php

@@ -4,7 +4,6 @@ namespace Kanboard\Model;
 
 use Kanboard\Core\Translator;
 use Kanboard\Core\Security\Token;
-use Kanboard\Core\Session\SessionManager;
 
 /**
  * Config model

app/Model/Group.php

@@ -2,9 +2,6 @@
 
 namespace Kanboard\Model;
 
-use SimpleValidator\Validator;
-use SimpleValidator\Validators;
-
 /**
  * Group Model
  *

app/Model/ProjectUserRole.php

@@ -28,7 +28,7 @@ class ProjectUserRole extends Base
      */
     public function getActiveProjectsByUser($user_id)
     {
-        return $this->getProjectsByUser($user_id, $status = array(Project::ACTIVE));
+        return $this->getProjectsByUser($user_id, array(Project::ACTIVE));
     }
 
     /**