This reverts commit e3229485.

Reason for revert: just landed to gather perf feedback.

Original change's description:
> [array] Change QuickSort to TimSort for Array.p.sort
> 
> R=​jgruber@chromium.org
> 
> Bug: v8:7382
> Change-Id: I95d2187d22c3bea4323789042b3426d65fde4999
> Reviewed-on: https://chromium-review.googlesource.com/1111959
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Simon Zünd <szuend@google.com>
> Cr-Commit-Position: refs/heads/master@{#53970}

TBR=jgruber@chromium.org,szuend@google.com

Change-Id: I1e150e856a32039eb241a745bd7e6180f2132430
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7382
Reviewed-on: https://chromium-review.googlesource.com/1112099Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53974}