Xpressengine\Routing\RouteRepository::delete PHP Method

    public function delete(InstanceRoute $route);

 /**
  * Destroy menu type associated with the menu item.
  *
  * @param MenuItem $item menu item instance
  * @return void
  */
 protected function destroyMenuType(MenuItem $item)
 {
     $menuTypeObj = $this->modules->getModuleObject($item->type);
     $menuTypeObj->deleteMenu($item->getKey());
     if ($menuTypeObj::isRouteAble()) {
         $instanceRoute = $this->routes->findByInstanceId($item->getKey());
         $this->routes->delete($instanceRoute);
     }
 }