[Bug c++/71376] __cpp_noexcept_function_type feature test macro not defined.

[eric at efcs dot ca]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71376

--- Comment #2 from Eric Fiselier <eric at efcs dot ca> ---
I was wrong about the "GCC has recently implemented "noexcept as part of the
type system"" part.  Closing as invalid.