This reverts commit d3d37157.

Reason for revert: waiting for Chromium LKGR to include the
updated test expectations.

Original change's description:
> Reland "Ship globalThis 🎉"
> 
> This is a reland of 4dac9872
> 
> Original change's description:
> > Ship globalThis 🎉
> >
> > Proposal repository:
> > https://github.com/tc39/proposal-global
> >
> > Intent to ship:
> > https://groups.google.com/d/msg/v8-users/Vkoh0wXRwaM/Yt7MpzhkAgAJ
> >
> > Bug: v8:5537
> > Change-Id: I60a6c5375165d89548db12fef454a64137d04c27
> > Reviewed-on: https://chromium-review.googlesource.com/1195494
> > Reviewed-by: Adam Klein <adamk@chromium.org>
> > Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
> > Commit-Queue: Mathias Bynens <mathias@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#55543}
> 
> TBR=adamk@chromium.org,machenbach@chromium.org,gsathya@chromium.org,mathias@chromium.org
> 
> No-Presubmit: true
> Bug: v8:5537
> Change-Id: I9776c24952e472c59861ee07f78b6456b19e6f2a
> Reviewed-on: https://chromium-review.googlesource.com/1203894
> Commit-Queue: Mathias Bynens <mathias@chromium.org>
> Reviewed-by: Mathias Bynens <mathias@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55635}

TBR=adamk@chromium.org,gsathya@chromium.org,mathias@chromium.org

Change-Id: Ie1dd22ecc4e13bf1bb6dbec108fbe37ea476bb1a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:5537
Reviewed-on: https://chromium-review.googlesource.com/1206471Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55640}