The upgrade to Django 2.2 has caused a spike in production logging due to RemovedInDjango30Warning deprecation warnings. For now, turn off logging of DeprecationWarning, ImportWarning, and PendingDeprecationWarning whenever we're using WSGI (they'll continue to be logged in devstack). We may eventually want this behind an easily flipped toggle, but for now just remove it to get this resolved quickly.