Every lesson in “My Lessons” has a small button in the bottom right corner to remove it from “My Lessons”. However, there seems to be no such button for “My Courses”.
In the Android app, it is possible to remove a course via a long press and tapping on “remove course”. When I do that, the course disappears on all my mobile devices, but it is still visible on the website.
I can’t imagine that this is the intended behaviour. Surely, there should be a button in the website version doing the same as the “remove course” option on mobile devices (and they should be synchronized).