[libcxx-commits] [libcxx] [libcxx] Don't use #define __unused in libcxx-03 for glibc (PR #230209)

[Nikolas Klauser via libcxx-commits]

https://github.com/philnik777 approved this pull request.

We really need to get a better solution than `system_reserved_names.gen.py`.

https://github.com/llvm/llvm-project/pull/230209