If you do not have any active Campaigns or Events and you want to remove the Event Tickets tab from your Online Donations page you can do this.
- Go into System Data from the Home page
- Click Edit from the left menu
- Select the Hide Event Tickets Tab.
This way your online donations page will not show the Event Tickets tab.
Another option is to retain the tab but add HTML enabled content in the online_ticket_header content area in System Data to let your donors know results of previous Campaigns or give details about upcoming Campaigns or Events.