refactor(shared): remove unused export

- Removed unused export statement for 'widgets/widgets.dart'
- Kept exports for 'extensions/extensions.dart' and 'services/services.dart'

Author: fulleni

lib/shared/shared.dart

@@ -1,3 +1,2 @@
 export 'extensions/extensions.dart';
-export 'services/services.dart';
-export 'widgets/widgets.dart';
+export 'services/services.dart';