I don’t have a lessons site.
Trying to build a site with several product downloads, not lessons.
How to i remove : you have completed 0 of 1 lessons, and mark as complete.
If you’re little tech savvy, you can easily do it using Power Editor ( More tab >> Power Editor )
All you need to do is, open progress.html.twig partial file and make necessary changes 🙂
If you wish to disable the the Progress Bar, you may do it using the Site Details by disabling Enable Progress bar toggle !!
Refer to this User Guide : http://spaces.invanto.com:8090/display/INT/Manage+Site+Details