[libcxx-commits] [libcxx] [NFC][libc++][test] Removes a TODO. (PR #100884)

[Mark de Wever via libcxx-commits]

mordante wrote:

> I still want to investigate using non-strict availability instead to see if that fixes these issues. I'd rather keep the TODOs here -- I'm not done yet with cleaning up PMR availability markup.

Since the patch is trivial to reproduce and is outdated due to [2fe08ed](https://github.com/llvm/llvm-project/commit/2fe08ed35a968dcfd797cbd31ae56bb0b1447faf) abandoning this patch.

https://github.com/llvm/llvm-project/pull/100884