Thanks! I double-checked that none of these removals indicated mistakenly unused code. I also checked whether any further removals were possible - your <variant> change identified a struct whose type wasn't being used at all, and whose _Bools could simply be moved into another struct. I went ahead and pushed that change, as it is also removing an internal identifier, even though the edits aren't purely red.

FYI @CaseyCarter.

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

Thanks for noticing and cleaning up this stuff! 🦅 👁️ 🧹