XF 2.0 Empty "Approval Queue"

Which was it? I seem to have a approval queue notification without content and I'd like it gone. Kind of annoying...
hi @AndrewSimm or @Brogan

where is this stored at database level so that I can empty manually?

Doing it via XenForo UI is a pain (and requires me to even de-flag the notification message every time).
Plus, there is no bulk cleanup too