@Sandy58 ...
In Canvas, you can go to your "Courses" >> "All Courses" screen to star (favorite) courses you want to appear on your Dashboard. If you think there are courses that you currently have access to that you no longer need, you'll need to speak with your school's Canvas administrator or someone from your school's Online Learning / eLearning / Distance Education team about this. Your school may have policies in place about what course appear within your Canvas account. They would be able to provide you all the details about this. Hopefully you'll be able to contact someone soon. Good luck to you!