[libcxx-commits] [libcxx] [libc++][cmp][NFC] Fix: Empty namespaces should be avoided (PR #210624)

[Hristo Hristov via libcxx-commits]

Zingam wrote:

For example: https://github.com/llvm/llvm-project/actions/runs/29698408259/job/88225567787?pr=83541

https://github.com/llvm/llvm-project/pull/210624