[libcxx-commits] [libcxx] Reverts around time_zone (PR #95058)

[Florian Mayer via libcxx-commits]

fmayer wrote:

> Since this error is a time-out it might not be possible to reproduce on a different machine. As @vitalybuka mentioned the test should be `UNSUPPORTED` instead of `XFAIL`.
> 

I already submitted this. I will note that even on my workstation without sanitizers, this test is slow. This revert wasn't mainly for sanitizers in the first place, but because other people also reported issues on the PR so I proposed this revert while we figure out the various issues.

https://github.com/llvm/llvm-project/pull/95058