[llvm] [InstCombine] Remove some of the complexity-based canonicalization (PR #91185)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> am I reading it right that you had no diff in your benchmarks? That seems surprising...

No. I just canceled the run as I thought it would produce tons of diff :(


https://github.com/llvm/llvm-project/pull/91185