[llvm] [DA] remove constraint propagation (PR #160924)

[Ehsan Amiri via llvm-commits]

amehsan wrote:

> To be pragmatic and to get LNO enabled by default I don't mind removing features. We can add those back later as needed.

Yes, I agree. If we need them we can add it back later.

https://github.com/llvm/llvm-project/pull/160924