title: Smarty: unset an array index in template
body: <p>I would like to do <code>{unset($array['index'])}</code> into a Smarty 3 template.</p>
  
  <p>Is such a syntax (or similar) supported ? After Googling and doc reading I can't find something satisfying.</p>
  
  <p>Maybe I should ask for a feature request to Smarty dev team ? :)</p>
  
  <p>Anyway, how would you do this given the currently available template functions ?</p>