[llvm] [Reassociate] Drop weight reduction to fix issue 91417 (PR #91469)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> We see an error on our buildbots
> 
> https://lab.llvm.org/staging/#/builders/185/builds/8128 https://lab.llvm.org/buildbot/#/builders/285/builds/3209 https://lab.llvm.org/buildbot/#/builders/259/builds/5223

It is caused by recently added tests: https://github.com/llvm/llvm-project/pull/89899
I will fix it later.


https://github.com/llvm/llvm-project/pull/91469