Axe scriptclass::resetgametomenu

This creates the game over screen for dying in No Death Mode. It's three
lines long and it's only called once. There's no reason it has to be a
separate function. From the name it sounds like it was meant to be a
generic function but it's anything but that. So just inline it in to
where it's called.

desktop_version/src/Script.cpp

@@ -2365,13 +2365,6 @@ void scriptclass::run(void)
     }
 }
 
-void scriptclass::resetgametomenu(void)
-{
-    obj.entities.clear();
-    game.quittomenu();
-    game.createmenu(Menu::gameover);
-}
-
 static void gotoerrorloadinglevel(void)
 {
     game.createmenu(Menu::errorloadinglevel);