code: func (c *Conn) Remove(key string) error {
  	code, body, err := c.doREST("DELETE", key, nil)
  	if err != nil {
  		return err
  	}
  	if code == 404 {
  		return ErrNotFound
  	}
  	if code != 204 {
  		return &Error{string(body), code}
  	}
  	return nil
  }
docs: // Remove deletes the data at key in the database.