Revert of Introduce ModulePendingScript (patchset #6 id:100001 of https://codereview.chromium.org/2815453006/ )

Reason for revert:
Reason for revert:
https://codereview.chromium.org/2653923008/ is
suspected to cause CHECK() failure (crbug.com/711703)
inside PendingScript's prefinalizer.

BUG=711703

Original issue's description:
> Introduce ModulePendingScript
>
> BUG=594639
>
> Review-Url: https://codereview.chromium.org/2815453006
> Cr-Commit-Position: refs/heads/master@{#464627}
> Committed: https://chromium.googlesource.com/chromium/src/+/2e5a5b8efccf655f183cc7ce0c59a88f77bb50f5

TBR=kouhei@chromium.org,yhirano@chromium.org,sigbjornf@opera.com,japhet@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=594639

Review-Url: https://codereview.chromium.org/2816043005
Cr-Commit-Position: refs/heads/master@{#464765}
4 files changed