Revert "[VirtualFileSystem] Support virtual working directory in the  RedirectingFS"

This reverts the original commit and the follow up:

Revert "[VirtualFileSystem] Support virtual working directory in the  RedirectingFS"
Revert "[test] Update YAML mapping in VirtualFileSystemTest"

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@374935 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed