This reverts commit b83e458fe5330227581e1e65f3866ddfcd597837. Also undo the use of namespace qualifier for `ReducePassList` as that seems to cause build failures.
This reverts commit b83e458fe5330227581e1e65f3866ddfcd597837. Also undo the use of namespace qualifier for `ReducePassList` as that seems to cause build failures.