farm-2.x-dev/modules/core/ui/menu/farm_ui_menu.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the farm_ui_menu module.
 */

/**
 * Implements hook_install().
 */
function farm_ui_menu_install() {

  // Delete system menus.
  \Drupal::configFactory()->getEditable('system.menu.footer')->delete();
  \Drupal::configFactory()->getEditable('system.menu.main')->delete();
  \Drupal::configFactory()->getEditable('system.menu.tools')->delete();
}