Grant "Delete Changes" permission to the new chromeos-leak-stoppers group

Also remove this permission from the sheriffs group. I only added that this
morning, and that was just to test if this permission does the right thing.

Change-Id: Id31571ec0430e758ec39ac6c6424be579559ce6c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/+/1964641
Reviewed-by: Sean Abraham <seanabraham@chromium.org>
Commit-Queue: Sean Abraham <seanabraham@chromium.org>
Tested-by: Sean Abraham <seanabraham@chromium.org>
2 files changed