gistfile1.txt

/**
 * Helper function; removes all required element flags on a section of a form.
 *
 * @param array $element
 *   A form or section of a form.
 *
 * @return array
 *   A section of a form tree with #required = 0 everyehere.
 */
function example_remove_required($element) {
  if (isset($element['#required']) && $element['#required'] == 1) {
    $element['#required'] = 0;
  }
  $children = element_children($element);
  foreach ($children as $key) {

    $element[$key] = icalfield_ajaxy_remove_required($element[$key]);
  }

  return $element;
}