[llvm] [LoopFusion] remove else after return (NFC) (PR #184993)

[Afonso Rafael via llvm-commits]

Alf0nso wrote:

> > @1997alireza my bad, terribly sorry! Since this pull request has already been merged, you mean doing another pull request amending the commit message?
> 
> Never mind. It will add more noise to the history. Let's keep it as it is.

Okay, fair enough.. sorry! Will try to be more careful next time!

https://github.com/llvm/llvm-project/pull/184993