[llvm] Revert "LangRef: Clarify llvm.minnum and llvm.maxnum about sNaN and signed zero (#112852)" (PR #168838)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> I also found #138451 which proposes the same thing and has a bunch of discussion. Cc @nikic @arsenm

Interesing, I was looking for PRs like that, but just found the commit https://github.com/nikic/llvm-project/commit/9211a4b3644b435aa09020ef3d3e1722178b355e unfortunately 😅

https://github.com/llvm/llvm-project/pull/168838