mozilla/kuma — pull request #1637 by lmorchard (2013-11-11 19:36:20+00:00)
Title: fix bug 937174: Ignore ElasticHttpNotFoundError during search unindex, with setting to control ignoring

Getting lots of email on this, and I also wonder if it's causing email issues on staging.

Hopefully, this silences the 404 errors from unindex()