that code removes the Schema Markup from the Themes HTML – schema isn’t something you see on the page. And checking your site that code has worked as there is no schema markup being generated.
Raise a new topic and explain what element you see that needs removing
Thats not the anything to do with the theme, and that link doesn’t look to be using the GP Theme anyways.
There must be a plugin you’re using thats displaying that box.
It’s from the Schema – All In One Schema Rich Snippets plugin which is what I thought this thread addressed. Yes, I am using GeneratePressVersion: 3.0.3