[llvm] Revert "[SCEV] Fold (C1 * A /u C2) -> A /u (C2 /u C1), if C2 > C1." (PR #158328)

[Reid Kleckner via llvm-commits]

rnk wrote:

I should say, I apologize for not reading the comments about the MSan failure too closely, I thought it was still related.

https://github.com/llvm/llvm-project/pull/158328