docs: def agent_service_deregister(consul_url=None, token=None, serviceid=None):
      '''
      Used to remove a service.
  
      :param consul_url: The Consul server URL.
      :param serviceid: A serviceid describing the service.
      :return: Boolean and message indicating success or failure.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' consul.agent_service_deregister serviceid='redis'
  
      '''
      ret = {}
      data = {}
      if not consul_url:
          consul_url = _get_config()
          if not consul_url:
              log.error('No Consul URL found.')
              ret['message'] = 'No Consul URL found.'
              ret['res'] = False
              return ret
  
      if not serviceid:
          raise SaltInvocationError('Required argument "serviceid" is missing.')
  
      function = 'agent/service/deregister/{0}'.format(serviceid)
      res = _query(consul_url=consul_url,
                   function=function,
                   token=token,
                   method='PUT',
                   data=data)
      if res['res']:
          ret['res'] = True
          ret['message'] = 'Service {0} removed from agent.'.format(serviceid)
      else:
          ret['res'] = False
          ret['message'] = 'Unable to remove service {0}.'.format(serviceid)
      return ret