Add a simpler version of remove_all.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184919 91177308-0d34-0410-b5e6-96231b3b80d8
Remove calls to Path in #ifdefs that don't seem to be used in any of the bots :-(

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184920 91177308-0d34-0410-b5e6-96231b3b80d8