Revert "Add support to -Wa,-W in clang"

This reverts commit e72eeca43b9577be2aae55f7603febbf223a6ab3.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374833 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed