chore: remove group

lib/game/components/plunger.dart

@@ -137,29 +137,3 @@ class PlungerAnchorPrismaticJointDef extends PrismaticJointDef {
     collideConnected = true;
   }
 }
-
-// /// {@template plunger_group}
-// /// Loads a [Plunger].
-// /// {@endtemplate}
-// class PlungerGroup extends Component {
-//   /// {@macro plunger_group}
-//   PlungerGroup({
-//     required this.position,
-//     required this.compressionDistance,
-//   });
-
-//   /// The position of this [PlungerGroup]
-//   final Vector2 position;
-
-//   /// Distance the plunger can lower.
-//   final double compressionDistance;
-
-//   @override
-//   Future<void> onLoad() async {
-//     final plunger = Plunger(
-//       position: position,
-//       compressionDistance: compressionDistance,
-//     );
-//     await add(plunger);
-//   }
-// }