This reverts commit 9a9aa71f.

Reason for revert: https://ci.chromium.org/p/v8/builders/ci/V8-Blink%20Linux%2064/33101

Original change's description:
> [wasm] Compile JS to WASM wrappers asynchronously
> 
> R=​mstarzinger@chromium.org, ahaas@chromium.org
> 
> Bug: v8:9231
> Change-Id: I9e18073bbe25bf8c9c5f9ace102316e6209d0459
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1669699
> Commit-Queue: Thibaud Michaud <thibaudm@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#62672}

TBR=mstarzinger@chromium.org,ahaas@chromium.org,thibaudm@chromium.org

Change-Id: I4c66663ca8a3f12f578c451f3c25705cebc753a7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:9231
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1700066Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62680}