refactor(subscription): remove unused client name overrides

Remove deprecated client name overrides for SubscriptionAliasResponse
and SubscriptionAliasResponseProperties that are no longer needed.

Author: v-huizhu2

specification/subscription/resource-manager/Microsoft.Subscription/Subscription/client.tsp

@@ -87,12 +87,3 @@ op subscriptionRename(
 ): RenamedSubscriptionId | Azure.ResourceManager.CommonTypes.ErrorResponse;
 
 @@override(SubscriptionOperationGroup.rename, subscriptionRename, "javascript");
-
-@@clientName(Microsoft.Subscription.SubscriptionAliasResponse,
-  "PutAliasResponse",
-  "java"
-);
-@@clientName(Microsoft.Subscription.SubscriptionAliasResponseProperties,
-  "PutAliasResponseProperties",
-  "java"
-);