update swap providers [skip ci]

lib/exchange/provider/stealth_ex_exchange_provider.dart

@@ -27,7 +27,7 @@ class StealthExExchangeProvider extends ExchangeProvider {
   String get title => 'StealthEX';
 
   @override
-  bool get isAvailable => true;
+  bool get isAvailable => false;
 
   @override
   bool get isEnabled => true;
@@ -39,7 +39,7 @@ class StealthExExchangeProvider extends ExchangeProvider {
   ExchangeProviderDescription get description => ExchangeProviderDescription.stealthEx;
 
   @override
-  Future<bool> checkIsAvailable() async => true;
+  Future<bool> checkIsAvailable() async => false;
 
   @override
   Future<Limits?> fetchLimits(

lib/view_model/exchange/exchange_view_model.dart

@@ -304,7 +304,7 @@ abstract class ExchangeViewModelBase extends WalletChangeListenerViewModel with
         if (FeatureFlag.isExolixEnabled) ExolixExchangeProvider(),
         SwapTradeExchangeProvider(),
         LetsExchangeExchangeProvider(),
-        StealthExExchangeProvider(),
+        // StealthExExchangeProvider(),
         XOSwapExchangeProvider(),
         SwapsXyzExchangeProvider(),
         JupiterExchangeProvider(),