Revert "Add a test for clang-tidy using the clang-cl driver."

This reverts commit fd1908ce445eba4544d64cc68b3c03249e4bf614.

This should be the correct CL to revert.  The clang-side patch
that enabled this functionality was reverted, so this test needs
to be reverted until it gets fixed.

llvm-svn: 278979