code: func (r *Route) RemoveWaker(waker *sleep.Waker) {
  	nextAddr := r.NextHop
  	if nextAddr == "" {
  		nextAddr = r.RemoteAddress
  	}
  	r.ref.linkCache.RemoveWaker(r.ref.nic.ID(), nextAddr, waker)
  }
docs: // RemoveWaker removes a waker that has been added in Resolve().