Zend Framework:如何删除Zend Form Hidden Element上的装饰器？

use Zend\Form\Element\Hidden;
use Zend\Form\Form;

class CustomHiddenElement extends Hidden
{
    public function loadDefaultDecorators()
    {
        $decorators = array(
            'ViewHelper',
        );
        $this->setDecorators($decorators);
        return $this;
    }
}

use Zend\Form\Form;
use CustomHiddenElement;

class MyForm extends Form
{
    public function init()
    {
        $this->add(array(
            'name' => 'my-hidden-element',
            'type' => 'CustomHiddenElement',
        ));
    }
}

<?php echo $this->form($myForm); ?>