[libcxx-commits] [libcxx] [libc++][NFC] Simplify the implementation of is_null_pointer a bit (PR #98728)

[Louis Dionne via libcxx-commits]

ldionne wrote:

I would drop NFC from the commit when merging, though. It's not intended to change anything, but it's also not a change to e.g. a comment.

https://github.com/llvm/llvm-project/pull/98728