If you wish to disable all of the event notifications for a specific calendar, follow these steps:

1. In the calendar list on the left side of the page, click the down-arrow next to the appropriate calendar and select Notifications. (Alternatively, click the Settings link at the bottom of the calendar list, then click the Notifications link to the right of the appropriate calendar.)
   
   
   
   
2. Click the remove link next to each reminder set in the Event reminder section.
   
   
   
   
3. Then, deselect any selected boxes in the Choose how you would like to be notified section.
   
   
   
   
4. Click Save.

Please note: that when you make changes to the reminder settings for events on your calendar, the changes will only apply to you. Invited guests or those who have access to the events will receive reminders according to their own Google Calendar reminder settings.