[libcxx-commits] [libcxx] [libc++][NFC] Simplify the implementation of aligned_union (PR #185449)

[Louis Dionne via libcxx-commits]

ldionne wrote:

(note that we can't do this with constexpr since this needs to support C++03 -- we discussed it during live review)

https://github.com/llvm/llvm-project/pull/185449