I'm trying to follow this tutorial that was written back in 2014: https://www.labnol.org/internet/remove-unused-css/28635/.
It says there should be a Remove unused CSS rules section that appears after running an "audit" in the devtools.
I'm currently using Chrome 60.0.3112.90 on Windows and there is no such section. It's not even in the specs. Was it replaced by Reduce render-blocking stylesheets? If yes, how is it the same?