Hi, It seems cloud_sptheme uses relbar() marcro to generate relbar. So you might be able to remote the hyperlink to genindex.html by overriding it. But, more simply way, you can disable to generate genindex using "html_use_index = False". Then the hyperlink will be removed automatically.
I think my team was able to modify that navigation bar, but we decided not to include the modification in the final layout so I don't remember what we did. Here are some hints that might help, though. 1. You are looking to override an element called div.related. (You can see this by