[libcxx-commits] [libcxxabi] [libc++] Remove the CI job testing Clang 15 (PR #66406)

[Louis Dionne via libcxx-commits]

ldionne wrote:

Ok, this was much more complicated than I anticipated because updating the macOS CI builders to Xcode 15 required a bunch of changes, but we should be near now. https://github.com/llvm/llvm-project/pull/67065 is bumping the AppleClang version, and then I'll rebase this patch.

https://github.com/llvm/llvm-project/pull/66406