Nikola,
also if you don’t use the GP sticky navigation there are are many plugins that are using jquery.js. In my case, it’s an additional image gallery plugin which is loading jquery.js for displaying the image gallery. Also a lightbox plugin is utilizing jquery.js.
When you don’t use the GP sticky navigation, then you’ve to find out which plugin is loading jquery.js. You can disable your installed plugins one by one to check, which one is using jquery.