[libcxx-commits] [libcxx] [libcxx] removes unnecessary traits from `has_unique_object_representations` (PR #69241)

[via libcxx-commits]

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

Are we sure what the behavior is here with GCC?

LGTM after ensuring we have test coverage for the remove_cv/remove_ext bits.

https://github.com/llvm/llvm-project/pull/69241