If the screen is available for removal, you can delete it from the Screen View.
- Choose Social > Applications > Apps Overview > Edit Application > Screen View.
- Click once to highlight the screen you want to remove.
- Click the Delete trash can icon.
- Confirm deletion.
Note: If there is no navigation to a screen within an app (meaning no visitors would ever reach it), you can leave it in the app builder. It simply isn't encountered if unapplicable.