Remove upper "menu"

Rxbbx’s solution to change the connection of circles from posts to pages worked like a charm and was exactly what I was looking for because I want to use the circles as the main menu to navigate a website. So now I would like to remove the main navigation that is at the top of the page, preferably while leaving the name in the upper left corner intact.

I tried to figure it out myself but haven’t succeeded sofar, so I was wondering if anyone could enlighten me how to do this.

Thanks!