Revert "[clang-doc] Reland "[clang-doc] Setup clang-doc frontend framework""

This reverts commit r328150 until we can fix the test that are failing
on the Windows release build.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@328172 91177308-0d34-0410-b5e6-96231b3b80d8
24 files changed