fixes compilation warnings

Yavsc/Controllers/HomeController.cs

@@ -13,12 +13,10 @@ using System.Threading.Tasks;
 
 namespace Yavsc.Controllers
 {
-    using System.Collections.Generic;
     using System.IO;
     using Models;
     using Yavsc;
     using Yavsc.Helpers;
-    using Yavsc.Models.Workflow;
 
     [AllowAnonymous]
     public class HomeController : Controller

Yavsc/Migrations/20171016090837_bugDescription.Designer.cs

@@ -1,7 +1,6 @@
 using System;
 using Microsoft.Data.Entity;
 using Microsoft.Data.Entity.Infrastructure;
-using Microsoft.Data.Entity.Metadata;
 using Microsoft.Data.Entity.Migrations;
 using Yavsc.Models;
 

Yavsc/Migrations/20171016090837_bugDescription.cs

@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using Microsoft.Data.Entity.Migrations;
 
 namespace Yavsc.Migrations

Yavsc/Migrations/20171019130120_subComment.Designer.cs

@@ -1,7 +1,6 @@
 using System;
 using Microsoft.Data.Entity;
 using Microsoft.Data.Entity.Infrastructure;
-using Microsoft.Data.Entity.Metadata;
 using Microsoft.Data.Entity.Migrations;
 using Yavsc.Models;
 

Yavsc/Migrations/20171019130120_subComment.cs

@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using Microsoft.Data.Entity.Migrations;
 
 namespace Yavsc.Migrations

Yavsc/Migrations/20171020090944_commentAuthor.cs

@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using Microsoft.Data.Entity.Migrations;
 
 namespace Yavsc.Migrations