code: func (dr *delRange) removeFromGCDeleteRange(jobID, tableID int64) error {
  	ctx, err := dr.sessPool.get()
  	if err != nil {
  		return errors.Trace(err)
  	}
  	defer dr.sessPool.put(ctx)
  	err = util.RemoveFromGCDeleteRange(ctx, jobID, tableID)
  	return errors.Trace(err)
  }
docs: // removeFromGCDeleteRange implements delRangeManager interface.