[Bug libstdc++/93161] Remove extra operator== for comparison categories in <compare> not in standard

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93161

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Once a proposal is approved for inclusion in the working draft any further
changes are made to the content in the draft, not the proposal. The original
proposal is of historical interest only, what matters is the content of the
working draft.