This reverts commit 3d5d99ff.

Reason for revert: causes this crash: https://bugs.chromium.org/p/chromium/issues/detail?id=1303458

Original change's description:
> [compiler] let InstructionSelector duplicate branch conditions
>
> Bug: v8:12484
> Change-Id: I44c2028efadbd70e7711f01d107995e0462f05d4
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3477094
> Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
> Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#79239}

Bug: chromium:1303458, v8:12484
Change-Id: I129467bcb2507f2fba894f5dd58304eb139f739c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3522069Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Darius Mercadier <dmercadier@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79469}