code: func (c *Cluster) RemoveHost(address *URI) {
  	c.mutex.Lock()
  	defer c.mutex.Unlock()
  	for i, uri := range c.hosts {
  		if uri.Equals(address) {
  			c.okList[i] = false
  			break
  		}
  	}
  }
docs: // RemoveHost black lists the host with the given URI from the cluster.