code: func (h *Handle) RouteDel(route *Route) error {
  	req := h.newNetlinkRequest(unix.RTM_DELROUTE, unix.NLM_F_ACK)
  	return h.routeHandle(route, req, nl.NewRtDelMsg())
  }
docs: // RouteDel will delete a route from the system.
  // Equivalent to: `ip route del $route`