code: def delete_comment(self, project, work_item_id, comment_id):
          
          route_values = {}
          if project is not None:
              route_values['project'] = self._serialize.url('project', project, 'str')
          if work_item_id is not None:
              route_values['workItemId'] = self._serialize.url('work_item_id', work_item_id, 'int')
          if comment_id is not None:
              route_values['commentId'] = self._serialize.url('comment_id', comment_id, 'int')
          self._send(http_method='DELETE',
                     location_id='608aac0a-32e1-4493-a863-b9cf4566d257',
                     version='5.1-preview.3',
                     route_values=route_values)
docs: DeleteComment.
          [Preview API] Delete a comment on a work item.
          :param str project: Project ID or project name
          :param int work_item_id: Id of a work item.
          :param int comment_id: