Apply fixes from StyleCI

src/Controllers/AuthController.php

@@ -159,7 +159,7 @@ class AuthController extends Controller
      */
     protected function settingForm()
     {
-        RETURN new Form(new Administrator(), function (Form $form) {
+        return new Form(new Administrator(), function (Form $form) {
             $form->action(admin_url('auth/setting'));
 
             $form->disableCreatingCheck();

src/Controllers/UserController.php

@@ -5,7 +5,6 @@ namespace Dcat\Admin\Controllers;
 use Dcat\Admin\Auth\Permission;
 use Dcat\Admin\Form;
 use Dcat\Admin\Grid;
-use Dcat\Admin\IFrameGrid;
 use Dcat\Admin\Models\Administrator as AdministratorModel;
 use Dcat\Admin\Models\Repositories\Administrator;
 use Dcat\Admin\Show;

src/Traits/HasFormResponse.php

@@ -84,7 +84,7 @@ trait HasFormResponse
     }
 
     /**
-     * 设置当前URL
+     * 设置当前URL.
      *
      * @param string $url
      *