Hexagon: Remove global state.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193499 91177308-0d34-0410-b5e6-96231b3b80d8
NVPTX: Remove unused globals.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193500 91177308-0d34-0410-b5e6-96231b3b80d8