[libcxx-commits] [libcxx] Revert "[libc++][NFC] Simplify pair a bit" (PR #97003)

[Louis Dionne via libcxx-commits]

ldionne wrote:

LGTM. I'll merge this to get back to a clean state ASAP, but @jyknight can you please submit a PR to add this regression test?

https://github.com/llvm/llvm-project/pull/97003