[Bug libstdc++/91383] C++17 should remove some library feature deprecated in C++14

[Sandy.Martel at lexisnexisrisk dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91383

--- Comment #12 from Sandy Martel <Sandy.Martel at lexisnexisrisk dot com> ---
That's a very good solution, thanks!