Forgot to uninstall

I just sold my rooted phone with avast protection on it. I did a full factory reset before selling but im worrued tgat the new owner may have issues with it. Has the full reset cleared it? If not what can i do remotely to fix it?

Thanks

Maybe only a full flash of a new ROM will solve this. And you can only do this locally, not remotely.
If you installed avast! anti-theft as root it will survive a factory reset afaik.

Was it installed as a systemapp? If so then no of course its not cleared. If it wasnt then yes its cleared.