title: How to unset elements in zend form
body: <p>I have a zend form in which I have many elements. I use form on many places. I have an element of <code>file</code> and that is:</p>
  
  <pre><code>$file= new Zend_Form_Element_File('merchantLogo');
          $file-&gt;setDestination("application_data/merchant/logo/original/");
          $file-&gt;addValidator('Count', false, 1);
          $file-&gt;addValidator('Extension', false, 'jpg,png,gif,jpeg');
          $file-&gt;setDecorators(array('ViewHelper','Errors'));
  </code></pre>
  
  <p>Now What I want to ask that how can I unset any element of this zend form. I want this because although on my one action I am not using this element, but this element is creating problem. 
  So how to unset any element?</p>