Quoting the README:
> If you are reading this and the 'Maple' Open edX release is out, you
> can safely delete this whole djangoapp. It only exists to hold old
> model migrations and any post-Maple installation will no longer have
> any model in the database for this app.
>
> But for some minor historical context, this djangoapp used to hold
> some integration with sailthru that we no longer needed.
We've released Sumac. This is overdue.
2c92c703d7