small fixes

frontend/pweb/lib/controllers/report_operations.dart

@@ -28,9 +28,7 @@ class ReportOperationsController extends ChangeNotifier {
 
   void update(PaymentsProvider provider) {
     if (!identical(_payments, provider)) {
-      _payments?.removeListener(_onPaymentsChanged);
       _payments = provider;
-      _payments?.addListener(_onPaymentsChanged);
     }
     _rebuildOperations();
   }
@@ -61,10 +59,6 @@ class ReportOperationsController extends ChangeNotifier {
     await _payments?.refresh();
   }
 
-  void _onPaymentsChanged() {
-    _rebuildOperations();
-  }
-
   void _rebuildOperations() {
     final items = _payments?.payments ?? const [];
     _operations = items.map(mapPaymentToOperation).toList();
@@ -107,9 +101,4 @@ class ReportOperationsController extends ChangeNotifier {
         left.end.isAtSameMomentAs(right.end);
   }
 
-  @override
-  void dispose() {
-    _payments?.removeListener(_onPaymentsChanged);
-    super.dispose();
-  }
 }