SneakGame: remove History<GamePadState> & History<KeyboardState>.

GitOrigin-RevId: 1b8dfef93a

Shared/SneakGame.cs

@@ -15,8 +15,6 @@ namespace SemiColinGames {
     bool fullScreen = false;
     IDisplay display;
 
-    History<KeyboardState> keyboard = new History<KeyboardState>(2);
-    History<GamePadState> gamePad = new History<GamePadState>(2);
     History<Input> input = new History<Input>(2);
 
     FpsCounter fpsCounter = new FpsCounter();