[libcxx-commits] [libcxx] [libc++] Remove a few __has_foo defines in __config (PR #90511)

[Mark de Wever via libcxx-commits]

https://github.com/mordante approved this pull request.

> LGTM with `__has_feature` and `__has_extension` added (until we switch to GCC 14). Maybe add a TODO for that.

FYI GCC 14 is planned for next week. So we might be able to land this review quite soon. (Assuming there are no GCC 14 migration issues.)

LGTM!

https://github.com/llvm/llvm-project/pull/90511