Also comment out some currently unused configs the presubmit
check now complains about. They'll be used soon, once
respective bots are added.
BUG=chromium:616035
TBR=kjellander@chromium.org
NOTRY=true
Review-Url: https://codereview.chromium.org/2076053002
Cr-Commit-Position: refs/heads/master@{#37056}
