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

[Louis Dionne via libcxx-commits]

ldionne wrote:

Gentle ping on this. I think the remaining changes needed are:

1. Add a test for multidimensional arrays in `has_unique_object_representation` (so that we test the `remove_all_extents` bit)
2. Also use `__has_unique_object_representations` for `has_unique_object_representations_v`

Apart from that, I think everyone was happy with the patch.

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