fix: remove createWidgetProperty duplicated subscription

Author: Egor Komarov

lib/core/wm/notifier_subscriptions_mixin.dart

@@ -114,7 +114,6 @@ mixin NotifierSubscriptionsMixin<W extends ElementaryWidget,
     final initialValue = isMounted ? reader(widget) : null;
     final notifier = createNotifier<T>(initialValue);
     _widgetPropsReaders[notifier] = reader;
-    _subscriptionsCollection.add(notifier);
     return notifier;
   }
 

lib/feature/wallet/wallet_prepare_transfer/wallet_prepare_transfer_page_wm.dart

@@ -100,8 +100,6 @@ class WalletPrepareTransferPageWidgetModel extends CustomWidgetModel<
     (w) => w.tokenSymbol,
   );
 
-  StreamSubscription<dynamic>? _currencySubscription;
-
   WalletPrepareTransferData? get _data => screenState.value.data;
 
   WalletPrepareTransferAsset? get _selectedAsset => _data?.selectedAsset;
@@ -119,12 +117,6 @@ class WalletPrepareTransferPageWidgetModel extends CustomWidgetModel<
     _initListeners();
   }
 
-  @override
-  void dispose() {
-    _currencySubscription?.cancel();
-    super.dispose();
-  }
-
   String? getSeedName(PublicKey custodian) => model.getSeedName(custodian);
 
   void onChangeAsset(AmountInputAsset newAsset) {