code: def remove_group(self, process_id, wit_ref_name, page_id, section_id, group_id):
          
          route_values = {}
          if process_id is not None:
              route_values['processId'] = self._serialize.url('process_id', process_id, 'str')
          if wit_ref_name is not None:
              route_values['witRefName'] = self._serialize.url('wit_ref_name', wit_ref_name, 'str')
          if page_id is not None:
              route_values['pageId'] = self._serialize.url('page_id', page_id, 'str')
          if section_id is not None:
              route_values['sectionId'] = self._serialize.url('section_id', section_id, 'str')
          if group_id is not None:
              route_values['groupId'] = self._serialize.url('group_id', group_id, 'str')
          self._send(http_method='DELETE',
                     location_id='766e44e1-36a8-41d7-9050-c343ff02f7a5',
                     version='5.0-preview.1',
                     route_values=route_values)
docs: RemoveGroup.
          [Preview API] Removes a group from the work item form.
          :param str process_id: The ID of the process
          :param str wit_ref_name: The reference name of the work item type
          :param str page_id: The ID of the page the group is in
          :param str section_id: The ID of the section to the group is in
          :param str group_id: The ID of the group