Hiding extra submit and preview buttons in subforms

The way recommended to remove buttons in the API function wsf_action_fix_subform($form_element, &$form_values) () does not work:

  foreach (array('preview', 'submit', 'delete', 'author') as $name) {
    $form_element[$name]['#access'] = FALSE;
  }
  return $form_element;

But the way modeled from addnode module does, below, though mayhap I'll come back and combine them so as to actually remove the extra set of buttons rather than just hide them.

  //get the subform array (from the subform_element module)
//  global $subforms;
  //the type of node to create
//  $nodetype = 'action';
// addnode version does a lot more

//Remove submit and preview buttons from the subform.
  $form_element['#form']['submit']['#attributes'] = array(
    'style' => 'height:0px; visibility:hidden;',
  );
  $form_element['#form']['preview']['#attributes'] = array(
    'style' => 'height:0px; visibility:hidden;',
  );

  return $form_element;

Resolution