It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
When enrolled in more than one Canvas course, you can customize the active courses you want to show in your Course list. To remove a course from the Dashboard, visit the All Courses page, and toggle the star icon next to the course.