[Bug libstdc++/67537] [6 Regression] r225189 breaks building boost hana

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67537

--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
The issue got fixed in clang, so there is no pressing need for a library fix
anymore.