This reverts commit 96186c4f.

Reason for revert: All gc stress bots time out:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/16361

Original change's description:
> [in-place weak refs] Fix: allow weak array types in large object space.
> 
> BUG=v8:7308,chromium:839953
> 
> Change-Id: I3738dc8169730763a587a2452421a54aff11e38e
> Reviewed-on: https://chromium-review.googlesource.com/1046645
> Commit-Queue: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#53016}

TBR=ulan@chromium.org,marja@chromium.org

Change-Id: I030638c27fd8990b9dab3d25a582039fb893bf78
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7308, chromium:839953
Reviewed-on: https://chromium-review.googlesource.com/1046549Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53019}