[Bug c++/116106] Unused concept template arguments not checked

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116106

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Hmm  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102975#c2 suggests gcc is
correct.