GitLab

Remove some backward compatibility logic that were put in more than a
few milestones ago.

Change-Id: I34c1959118b7c8fef8ae4e74df465f14af4db079
Reviewed-on: https://chromium-review.googlesource.com/580109
Commit-Queue: Derek Cheng <imcheng@chromium.org>
Reviewed-by: Takumi Fujimoto <takumif@chromium.org>
Cr-Commit-Position: refs/heads/master@{#488517}