tree cf58f3ac82481e4aad93a52a66ce434942e8a588
parent 85d69337dbf5be2055681df6bae267123333ebca
author Christopher Di Bella <cjdb@google.com> 1618260905 +0000
committer Copybara-Service <copybara-worker@google.com> 1620715543 -0700

[libcxx] removes operator!= and globally guards against no spaceship operator

* `operator!=` isn't in the spec
* `<compare>` is designed to work with `operator<=>` so it doesn't
  really make sense to have `operator<=>`-less friendly sections.

Depends on D100283.

Differential Revision: https://reviews.llvm.org/D100342

NOKEYCHECK=True
GitOrigin-RevId: 20506fb1f361e41012506c6c252fd690541fc708