[libcxx-commits] [libcxx] [libcxx] replaces SFINAE with requires-expressions in `bind_front` and `bind_back` (PR #68249)

[Louis Dionne via libcxx-commits]

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

LGTM as well, thanks for the nice cleanup. Can you please rebase onto `main` (or merge or whatever the workflow is!)? You'll need to trigger CI with d32edcb86dfd18771fd05b66ad89a3377dc8c32b included.

https://github.com/llvm/llvm-project/pull/68249