Joe -- Ah ok, you're using the new ArcGIS StoryMaps (I moved your post from the classic Esri Story Maps GeoNet space to the ArcGIS StoryMaps space).
There's no way to hide that footer at the moment. Is hiding that something that you need to do when publishing stories? Do you want to just hide it or replace it with something else? Any additional info you could provide would be helpful.
Owen Evans
Lead Product Engineer | StoryMaps