Events 1 API question

On my notification page, I see:

The following plugins in your system are using Events 1 API deprecated handlers: ''. Please, update them to use Events 2 API. See docs.moodle.org/dev/Event_2#Event_dispatching_and_observers .

Note that the helpful name of the affected plugin is ' ' -- so helpful! I'm pretty sure that this is NOT coming from Joomdle, but I wanted to double check. I don't have any other plugins installed on Moodle, other than the 385 (!) that come shipped with it.

I figured I'd check and see if you'd ever seen this before. (Oh, and my phantom errors have returned...sigh. Working on changing to a new server...)

This warning is shown when there are entries in old events_handlers table. You don't really need to worry about it,although if you are sure it is not being used, you coudl manually delete the row in the database.
If there is no name in message,there is no component set in table.

THANK YOU!!! That has been driving me crazy!