Update WidgetPolicyChecker.cs

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Widgets/Volo/Abp/AspNetCore/Mvc/UI/Widgets/WidgetPolicyChecker.cs

@@ -1,10 +1,7 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authorization;
-using Microsoft.AspNetCore.Mvc.ViewComponents;
 using Microsoft.Extensions.Options;
 using Volo.Abp.Users;