code: func (l *LiteBackend) Delete(ctx context.Context, key []byte) error {
  	if len(key) == 0 {
  		return trace.BadParameter("missing parameter key")
  	}
  	return l.inTransaction(ctx, func(tx *sql.Tx) error {
  		return l.deleteInTransaction(ctx, key, tx)
  	})
  }
docs: // Delete deletes item by key, returns NotFound error
  // if item does not exist