Please complete the following steps to remove your Eventable calendar feed from your Google Calendar:
Go to your Google Calendar settings
(If the above link doesn't work, open up Google Calendar, find Other calendars on the left-hand side, click the ▼ arrow next to it and select Settings)Scroll to the Other Calendars section on the page, and find the calendar feed you wish to unsubscribe from.
Click the Unsubscribe link on the far right hand side