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

[Mehdi Amini via llvm-commits]

joker-eph wrote:

Seems like the Bazel config is a bit busted, we should update it: building a release build with these checks isn't really something that makes sense to me.

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