This reverts commit 0ef2eea7.

Reason for revert: broke noavx https://ci.chromium.org/ui/p/v8/builders/ci/V8%20Linux%20-%20debug/34035/overview

Original change's description:
> [wasm-simd][ia32] Optimize some signed integer widening sequences
>
> Optimize ia32 code sequences. This is the same sequences as x64, which
> have been optimized based on supported extensions.
>
> Bug: v8:11464
> Change-Id: I10396a928a431cdd2de9b22bb8a395bc0adb4694
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2704897
> Reviewed-by: Deepti Gandluri <gdeepti@chromium.org>
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#72926}

Bug: v8:11464
Change-Id: Ibeaf35b5f6aa75d10e24f1fb57843dbc0791d37a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2713208
Auto-Submit: Zhi An Ng <zhin@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#72929}