code: public EtcdResponse delete(final String key) throws EtcdException {
  		UriComponentsBuilder builder = UriComponentsBuilder.fromUriString(KEYSPACE);
  		builder.pathSegment(key);
  
  		return execute(builder, HttpMethod.DELETE, null, EtcdResponse.class);
  	}
docs: Deletes the node with the given key from etcd.
  
  @param key
  the node's key
  @return the response from etcd with the node
  @throws EtcdException
  in case etcd returned an error