[fix] remove some internal urls and emails

src/sql/engine/expr/ob_rt_datum_arith.h

@@ -28,7 +28,7 @@ namespace sql
 // (e.g.: ObExprMul::calc). ObDatum can not do this, because ObDatum's memory is binding to ObExpr,
 // it always need a ObExpr to do arithmetic evaluation. We must build the needed arithmetic
 // expressions in compile time in static typing engine, see: the `linear_inter_expr_` expression of
-// https://code.aone.alibaba-inc.com/oceanbase/oceanbase/codereview/3278690 commit. It is hard
+//
 // to use,  we need a convenient way to do runtime ObDatum arithmetic evaluation.
 //
 // Usage: