Code review comment for lp:~gmb/launchpad/remove-bug-heat-from-garbo-daily-bug-511283

I've requested a release-critical for this branch since without it there's a good chance that garbo-daily will take well over 30 hours to run after the rollout. That's not so clever an attribute in a daily script.

Note that this would have landed on Friday but for unrelated buildbot failures.