I'd like to delete all calendars and contacts on an iPod Touch with iOS 5.0.1 without affecting calendars and contacts in OS X.
I've read guides that instruct to disable calendars for accounts in order to delete calendars. In my case none of my accounts have ever had calendars enabled. Calendars have only been transferred by cable using iTunes.
Can this be done without a third party app? If not, what would be needed to accomplish it?