Issue #3024715 by jonathan1055: Simplify options_without_none and do not remove _none

 */

function _scheduler_content_moderation_integration_hide_empty_state_options(array $element, FormStateInterface $form_state) {

  foreach (Element::getVisibleChildren($element) as $key) {

    // Hide the element if there are no options.

    if (empty($element[$key]['#options'])) {

      $element[$key]['#access'] = FALSE;

    }

    else {

      $options_without_none = array_filter($element[$key]['#options'], function ($option) {

        return $option != '_none';

      }, ARRAY_FILTER_USE_KEY);

      // Hide the element if the only option is 'none'.

      $options_without_none = array_diff_key($element[$key]['#options'], ['_none' => '']);

      $element[$key]['#access'] = (bool) count($options_without_none);

      // If there is only one option apart from 'none' then remove 'none'.

      if (count($options_without_none) === 1) {

        $element[$key]['#value'] = key($options_without_none);

        $element[$key]['#options'] = $options_without_none;

      }

    }

  }

  return $element;