comment_field_config_delete

comment_field_config_delete(FieldConfigInterface $field)

function comment_field_config_delete(FieldConfigInterface $field) {
  if ($field->getType() == 'comment') {
    // Delete all comments that used by the entity bundle.
    $entity_query = \Drupal::entityQuery('comment');
    $entity_query->condition('entity_type', $field->getEntityTypeId());
    $entity_query->condition('field_name', $field->getName());
    $cids = $entity_query->execute();
    entity_delete_multiple('comment', $cids);
  }
}