Remove Automatic Display Answer global setting

[MorenoTropical]

People get confused when they enable Auto Advance but it doesn't work. The preference had an use when Anki didn't have Auto advance, but now it doesn't have a purpose.

Example: https://forums.ankiweb.net/t/auto-advance-in-deck-options/51898

[welcome]

Hello! 👋 Thanks for logging this issue. Please remember we are all volunteers here, so some patience may be required before we can get to the issue. Also remember that the fastest way to get resolution on an issue is to propose a change directly, https://github.com/ankidroid/Anki-Android/wiki/Contributing