disable option of required in webform in drupal 7

My function:

     function _custom_get_ublox_communication_checkbox_form_element() {
  return array(
    '#type' => 'checkboxes',
    '#title' => t('Communications'),
    '#options' => array(
      1 => t('I consent to retaining my personal data for the purposes of receiving personalized marketing materials, offers, invitations to webinars and other similar events. To learn more, read our <a )),
    ),

    '#required' => TRUE,
  );
}

This checkbox is mandatory as there is option '#required' => TRUE, but after removing the required option it is not even removing the required(*) check from the field. Can anyone please help me on this? Thanks in advance