[Bug libstdc++/83626] std::experimental::filesystem::remove_all throws exception instead of returning 0 if path doesn't exist

[chillermillerlong at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83626

--- Comment #4 from Andrew Gunnerson <chillermillerlong at hotmail dot com> ---
Thanks for the quick fix!