GitLab

All Sync data types have been migrated to USS, so the migrator isn't
needed anymore.

Bug: 1084499
Change-Id: I62c13ae30f686c6670bec826bbf6ecf0bd1978bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2207384Reviewed-by: Maksim Moskvitin <mmoskvitin@google.com>
Reviewed-by: Mikel Astiz <mastiz@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#771595}