Disowning OverdueJobSpec alerts
Disowning OverdueJobSpec alerts

I have only ever seen these alerts fire because of offline/quarantined
bots.

Change-Id: I1aecdbbb919a6f86dadb7e5b707aa082e288200b
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/244497
Reviewed-by: Ben Wagner aka dogben <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot