Does anyone know why this says "No javascript, no stylesheets, no trackers. Just your words."

But when you look at the github repo here: https://github.com/HermanMartinus/bearblog

It says the repo is 40% CSS and 31% Javascript? Am I misinterpreting what this means in this context?

If you click on the language name, GitHub should take you to a list of all files in that language in the repo. It looks like the JavaScript is basically all admin type stuff.