[llvm-branch-commits] [libcxx] [libc++][C++03] Remove tests from libcxx-03 which aren't run in C++03 mode (PR #144094)

[Louis Dionne via llvm-branch-commits]

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

LGTM with CI passing.

https://github.com/llvm/llvm-project/pull/144094