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This is needed because re-recording archives (using record_wpr)
causes these files to get re-alphabetized automatically.
This commit lets us re-record an archive without producing an
unreadable diff.

Doing this also removes the duplicate key
"androidpolice_mobile_sync_scroll_2018" from rendering_mobile.json.

Tangentially, also delete the unused archive
rendering_mobile_007.wprgo.sha1.

Bug: 872551, 867368
Change-Id: Ib15c9c0a8600e7fa510a146ad896aa92e4f9de45
Reviewed-on: https://chromium-review.googlesource.com/1171677Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582414}