PLEASE PLEASE allow us to hide the system generated actions/views etc. It makes my app crazy cumbersome and I prefer not to use those, I always create my own. There should be a way to hide them, they just get in the way!
There is a way to hide action button using Slices - in Slice settings you can select only actions you are about to use. Also, you can hide system generated actions by clicking the position Hide in action settings.
About system generated views - you can select view position as Ref - it will be hidden if there is no reference for the view.
I hope I answer you question, if not please attach some details.

