GitLab

This CL removes a few launcher metrics that are no longer used,
including some that are expiring.

Bug: 1142490, 1152023
Change-Id: Id10ad35ee9ee6e6ed3933d811bd4bf721bdc258c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2567236Reviewed-by: Tony Yeoman <tby@chromium.org>
Commit-Queue: Rachel Wong <wrong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833046}