Core: add generic handling of excluded locations

Currently there can be locations that are marked as excluded,
but don't have rules to enforce it, while fill has special handling
for excluded locations already.

This change removes special rules, and adds a generic rule instead.

worlds/pokemon_rb/regions.py

@@ -14,7 +14,6 @@ def create_region(world: MultiWorld, player: int, name: str, locations_per_regio
             ret.locations.append(location)
             if world.randomize_hidden_items[player].value == 2 and "Hidden" in location.name:
                 location.progress_type = LocationProgressType.EXCLUDED
-                add_item_rule(location, lambda i: not (i.advancement or i.useful))
     if exits:
         for exit in exits:
             ret.exits.append(Entrance(player, exit, ret))