code: func (t *tableCommon) removeRowIndex(sc *stmtctx.StatementContext, rm kv.RetrieverMutator, h int64, vals []types.Datum, idx table.Index, txn kv.Transaction) error {
  	return idx.Delete(sc, rm, vals, h, txn)
  }
docs: // removeRowIndex implements table.Table RemoveRowIndex interface.能