I have an iPhone 5 with iOS 8.1.2 and I cannot delete a cloud calendar. When I edit and go to the calendar all I get is the name of the calendar and the color that represents it. No delete button at the bottom. In fact, nothing below the colors. Has anyone had this issue and are there any solutions short of a reset?
Subscribed Calendar can't be deleted directly from the Calendar app.
Go to Settings → Mail, Contacts, Calendars and you can unsubscribe from it.
Sometimes subscribed calendars on OS X can't be deleted on iOS.