Removed all the unused directives in the Solution with the assistance of Resharper

src/Web/ViewModels/Account/RegisterViewModel.cs

@@ -1,5 +1,4 @@
-using System;
-using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations;
 
 namespace Microsoft.eShopWeb.Web.ViewModels.Account
 {

src/Web/ViewModels/Manage/TwoFactorAuthenticationViewModel.cs

@@ -1,6 +1,4 @@
-using System.ComponentModel.DataAnnotations;
-
-namespace Microsoft.eShopWeb.Web.ViewModels.Manage
+namespace Microsoft.eShopWeb.Web.ViewModels.Manage
 {
     public class TwoFactorAuthenticationViewModel
     {

src/Web/ViewModels/OrderItemViewModel.cs

@@ -1,8 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel.DataAnnotations;
-
-namespace Microsoft.eShopWeb.Web.ViewModels
+namespace Microsoft.eShopWeb.Web.ViewModels
 {
     public class OrderItemViewModel
     {