Turn off personalized badge and group reminders

Comments out emails that AC would rather not send out at all.
Anthrocon ended up using group registrations to manage staff, so these emails were being sent to anyone who was put in charge of a staff group.

Currently the text suggests that you can assign badges at the event, but AC has a "use it or lose it" policy for unassigned dealer assistant badges - and of course, you aren't going to be adding staff badges at-event. Until/unless we have a chance to review the text on these emails, it's better that they aren't sent out at all.