Revert of [heap] Fine-grained JSArrayBuffer tracking (patchset #7 id:200001 of https://codereview.chromium.org/1936233002/ )

Reason for revert:
Breaks readonly test
  https://uberchromegw.corp.google.com/i/client.v8/builders/V8%20Linux/builds/10121

Original issue's description:
> [heap] Fine-grained JSArrayBuffer tracking
>
> Track based on JSArrayBuffer addresses instead of the attached backing store.
> This way we can later on iterate buffers on a single page.
>
> BUG=chromium:581412
> LOG=N
> R=jochen@chromium.org, hpayer@chromium.org
>
> Committed: https://crrev.com/4cdf71e2d07c038d7af84e41c6e6d0093af0f0de
> Cr-Commit-Position: refs/heads/master@{#36140}

TBR=hpayer@chromium.org,jochen@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:581412

Review-Url: https://codereview.chromium.org/1961403002
Cr-Commit-Position: refs/heads/master@{#36143}