[libcxx-commits] [libunwind] [libcxxabi] Remove deprecated warning from cmake files (PR #72595)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne approved this pull request.

Thanks a bunch for the cleanup! We often forget these but it always feels great to find one and clean it up!

https://github.com/llvm/llvm-project/pull/72595