chore: removed caching asset

lib/game/game_assets.dart

@@ -1,5 +1,4 @@
 import 'package:pinball/game/game.dart';
-import 'package:pinball/gen/assets.gen.dart';
 import 'package:pinball_components/pinball_components.dart' as components;
 import 'package:pinball_theme/pinball_theme.dart' hide Assets;
 
@@ -134,7 +133,6 @@ extension PinballGameAssetsX on PinballGame {
       images.load(sparkyTheme.leaderboardIcon.keyName),
       images.load(androidTheme.leaderboardIcon.keyName),
       images.load(dinoTheme.leaderboardIcon.keyName),
-      images.load(Assets.images.components.background.path),
     ];
   }
 }

lib/gen/assets.gen.dart

@@ -44,10 +44,6 @@ class $AssetsImagesBonusAnimationGen {
 class $AssetsImagesComponentsGen {
   const $AssetsImagesComponentsGen();
 
-  /// File path: assets/images/components/background.png
-  AssetGenImage get background =>
-      const AssetGenImage('assets/images/components/background.png');
-
   /// File path: assets/images/components/key.png
   AssetGenImage get key =>
       const AssetGenImage('assets/images/components/key.png');