Moodle 3.9.1+, recently upgraded from 3.1.5 (!).
There is a 0% chance of us using H5P content, and I have disabled "Content Bank" in the repositories section. However, it still shows up in the Boost navigation drawer menu. Clicking on it still brings the empty box up.
How do you actually remove this? It's clearly still running, else that nav drawer wouldn't actually go anywhere.