This reverts commit 2e9f7253.

Reason for revert: Done experimenting...

Original change's description:
> [parser] Turn FLAG_experimental_preparser_scope_analysis on.
> 
> Experimental run, just for getting data from RuntimeCallstats bots.
> 
> To be reverted soon - expected to break various things.
> 
> BUG=v8:5516
> NOTREECHECKS=true
> 
> Change-Id: I6d235fddee36b0f0efe70065166d25ed40d6e163
> Reviewed-on: https://chromium-review.googlesource.com/557863
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Marja Hölttä <marja@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#47248}

TBR=adamk@chromium.org,machenbach@chromium.org,marja@chromium.org

Change-Id: I871d8a68442597b777e8f9e3d04ba3298ae87549
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:5516
Reviewed-on: https://chromium-review.googlesource.com/608190Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47249}