[libc++][test] Removes old fallbacks.
authorMark de Wever <koraq@xs4all.nl>
Sun, 4 Jun 2023 17:12:42 +0000 (19:12 +0200)
committerMark de Wever <koraq@xs4all.nl>
Tue, 20 Jun 2023 17:29:49 +0000 (19:29 +0200)
commit202054559cb2fe38b3226cdc4e501e264e6a3a48
tree1ca5f52b984e46f48faa826c715c066e6f340bb1
parent09addf9cbe0a5a8ba9d5666b6e25e6308c441ae2
[libc++][test] Removes old fallbacks.

All supported compilers support the -std=year except Clang < 17 which
doesn't support C++23. This fallback is marked for removal once we no
longer support Clang 16.

Reviewed By: #libc, ldionne

Differential Revision: https://reviews.llvm.org/D152106
libcxx/utils/libcxx/test/params.py