This reverts commit edf90ee8.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8%20Win32%20-%20debug%20builder/36129?

Original change's description:
> [wasm-simd][liftoff][ia32][x64] Implement i8x16 shr
> 
> The code sequence is the same as TurboFan, only wrapped in a template to
> share the implementation.
> 
> Bug: v8:9909
> Change-Id: I9c1b37bbfafe91d1bd8edd7f9dafd86ff1c07623
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2202723
> Commit-Queue: Zhi An Ng <zhin@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#67842}

TBR=clemensb@chromium.org,zhin@chromium.org

Change-Id: I04b9993040fa8a1dd69a4fa892a35273682d3efa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9909
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2204550Reviewed-by: Zhi An Ng <zhin@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#67843}