June 20, 2013: Google Calendar - The delete calendar button has been moved to a different place. It used to be under "Settings --> Calendars," but it is now located in the "Calendar Details" page for each calendar. Look on the sidebar for the "Delete Calendar" topic. There's a link to permanently remove the calendar. Or, use a shortcut method. On the main Calendar page, click the arrow next to the name of the calendar you wish to delete. Choose "Calendar Settings."