GitLab

Remove some metrics that are not very useful and not monitored.

R=drubery

Bug: 975066,974981,972786,969971,969968,969923,833706
Change-Id: I6b30628363cf21080818a9b5345da1acc09fcabd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1677225
Auto-Submit: Varun Khaneja <vakh@chromium.org>
Reviewed-by: Daniel Rubery <drubery@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672728}