Remove test of data providers, and replace expectNotToPerformAssertions() to assertTrue(true) for code coverage.

tests/framework/widgets/ActiveFormTest.php

@@ -110,8 +110,6 @@ HTML
 
     public function testRegisterClientScript()
     {
-        $this->expectNotToPerformAssertions();
-
         $this->mockWebApplication();
         $_SERVER['REQUEST_URI'] = 'http://example.com/';
 
@@ -135,6 +133,8 @@ HTML
         $form->field($model, 'name');
         $form::end();
         ob_get_clean();
+
+        $this->assertTrue(true);
     }
 
     /**