code: def remover(self, id_user_group):
          
          if not is_valid_int_param(id_user_group):
              raise InvalidParameterError(
                  u'Invalid or inexistent user group id.')
  
          url = 'ugroup/' + str(id_user_group) + '/'
  
          code, xml = self.submit(None, 'DELETE', url)
  
          return self.response(code, xml)
docs: Removes a user group by its id.
  
          :param id_user_group: User Group's identifier. Valid integer greater than zero.
  
          :return: None
  
          :raise GrupoUsuarioNaoExisteError: User Group not found.
          :raise InvalidParameterError: User Group id is invalid or none.
          :raise DataBaseError: Networkapi failed to access database.
          :raise XMLError: Networkapi fails generating response XML.