In the Folder List, right-click Shared Calendars and select Properties.
The Shared Calendar Properties dialog appears.
Select the Subscribe tab.
A list of subscribed calendars appears in the Calendars list.
Select the calendar from which you wish to unsubscribe.
A dialog appears asking if you wish to unsubscribe from this calendar.
Click yes to unsubscribe. Click no to cancel.
The calendar will be deleted from your subscribed calendar list.