Calendar was only removing old event types if there was at least one new event type.
Calendar was only removing old event types if there was at least one new event type.

smartcop/MIT-Mobile-for-iOS,smartcop/MIT-Mobile-for-iOS,MIT-Mobile/MIT-Mobile-for-iOS,MIT-Mobile/MIT-Mobile-for-iOS,xNUTs/MIT-Mobile-for-iOS,xNUTs/MIT-Mobile-for-iOS