/**
 * Implements hook_entity_bundle_delete().
 */
function {{ machine_name }}_entity_bundle_delete($entity_type_id, $bundle) {
  // Remove the settings associated with the bundle in my_module.settings.
  $config = \Drupal::config('my_module.settings');
  $bundle_settings = $config->get('bundle_settings');
  if (isset($bundle_settings[$entity_type_id][$bundle])) {
    unset($bundle_settings[$entity_type_id][$bundle]);
    $config->set('bundle_settings', $bundle_settings);
  }
}