code: def delete_machine_group(self, project_name, group_name):
          
  
          headers = {}
          params = {}
          resource = "/machinegroups/" + group_name
          (resp, headers) = self._send("DELETE", project_name, None, resource, params, headers)
          return DeleteMachineGroupResponse(headers, resp)
docs: delete machine group in a project
          Unsuccessful opertaion will cause an LogException.
  
          :type project_name: string
          :param project_name: the Project name 
  
          :type group_name: string
          :param group_name: the group name
  
          :return: DeleteMachineGroupResponse
          
          :raise: LogException