code: func (a *AddrBook) RemoveAddress(addr *NetAddress) {
  	a.mtx.Lock()
  	defer a.mtx.Unlock()
  	ka := a.addrLookup[addr.String()]
  	if ka == nil {
  		return
  	}
  	log.Info("Remove address from book", "addr", addr)
  	a.removeFromAllBuckets(ka)
  }
docs: // RemoveAddress removes the address from the book.