drupalcampbristol/vendor/chi-teck/drupal-code-generator/templates/d8/hook/uninstall.twig

/**
 * Implements hook_uninstall().
 */
function {{ machine_name }}_uninstall() {
  // Remove the styles directory and generated images.
  file_unmanaged_delete_recursive(file_default_scheme() . '://styles');
}