[llvm] [llvm-profgen] Revert #99826 and #99026 (PR #100147)

[via llvm-commits]

WenleiHe wrote:

> @WenleiHe and @williamweixiao: I suggest we revert these for now and attempt to re-land later.

Thanks for working through the feedbacks and making it easier to review. Much appreciated!

https://github.com/llvm/llvm-project/pull/100147