build(config): remove unused Flutter dependencies

Remove dependencies and asset declarations that are no longer referenced so the resolved package graph stays smaller and easier to verify.

pubspec.yaml

@@ -24,10 +24,6 @@ dependencies:
   flutter:
     sdk: flutter
 
-  # The following adds the Cupertino Icons font to your application.
-  # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.5
-  google_fonts: ^6.1.0
   provider: ^6.1.1
   google_mobile_ads: ^4.0.0
   flutter_vless: 1.1.5
@@ -36,7 +32,6 @@ dependencies:
   url_launcher: ^6.3.2
   flutter_secure_storage: ^10.3.1
   uuid: ^4.5.3
-  path_provider: ^2.1.5
   package_info_plus: ^6.0.0
 
 dev_dependencies:
@@ -56,7 +51,9 @@ flutter:
 
   # To add assets to your application, add an assets section, like this:
   assets:
-    - assets/
+    - assets/background.png
+    - assets/brand.png
+    - assets/finland_flag_256.png
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/assets-and-images/#resolution-aware.