Revert of [wasm] simpler detection if we compiled asm-wasm (patchset #1 id:1 of https://codereview.chromium.org/2582583002/ )

Reason for revert:
https://build.chromium.org/p/client.v8/builders/V8%20Mac%20GC%20Stress/builds/10384

Original issue's description:
> [wasm] simpler detection if we compiled asm-wasm
>
> BUG=643595
>
> Review-Url: https://codereview.chromium.org/2582583002
> Cr-Commit-Position: refs/heads/master@{#41738}
> Committed: https://chromium.googlesource.com/v8/v8/+/cb433bed0b940a7073b5215e6684b940eec54edd

TBR=yangguo@chromium.org,bradnelson@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=643595

Review-Url: https://codereview.chromium.org/2582623002
Cr-Commit-Position: refs/heads/master@{#41739}