Back out cleanup patch. Got old version and needs work.

src/backend/executor/execMain.c

src/backend/executor/execUtils.c

src/backend/optimizer/path/costsize.c

src/backend/optimizer/prep/_deadcode/prepkeyset.c

src/include/executor/executor.h

src/test/regress/expected/alter_table.out

src/test/regress/expected/create_misc.out

src/test/regress/expected/domain.out

src/test/regress/expected/insert.out

src/test/regress/expected/select_having.out

src/test/regress/output/constraints.source

src/test/regress/sql/create_misc.sql

src/test/regress/sql/select_having.sql