feat: Refactor repositories and modules to remove FirebaseAuth dependency and utilize DataConnectService

apps/mobile/packages/features/client/billing/lib/src/presentation/blocs/billing_bloc.dart

@@ -54,7 +54,6 @@ class BillingBloc extends Bloc<BillingEvent, BillingState>
           _getSpendingBreakdown.call(state.period),
         ]);
 
-        final double currentBill = results[0] as double;
         final double savings = results[1] as double;
         final List<Invoice> pendingInvoices = results[2] as List<Invoice>;
         final List<Invoice> invoiceHistory = results[3] as List<Invoice>;