[llvm] [mlir] Revert "Fix LLVM_ENABLE_ABI_BREAKING_CHECKS macro check: use #if inst… (PR #110923)

[Mehdi Amini via llvm-commits]

joker-eph wrote:

There hasn’t been a failing bot on the original PR, do you have some repro instructions about the issue your seeing?

https://github.com/llvm/llvm-project/pull/110923