GitLab

They aren't in histograms.xml, and that has been the case for multiple
years, so they're presumably safe to remove.

Bug: 643569
Change-Id: I262be8f7b4c97a6e85b1f58ddb54fe56dd67772b
Reviewed-on: https://chromium-review.googlesource.com/1053872Reviewed-by: Eric Roman <eroman@chromium.org>
Commit-Queue: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557610}