code: func (s *Scheduler) Remove(ctx context.Context, appID string) error {
  	tx, err := s.db.Begin()
  	if err != nil {
  		return err
  	}
  
  	err = s.remove(ctx, tx, appID)
  	if err != nil {
  		tx.Rollback()
  		return err
  	}
  
  	return tx.Commit()
  }
docs: // Remove removes the CloudFormation stack for the given app.