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

tests/FunctionalTests/Web/Controllers/ApiCatalogControllerList.cs

@@ -1,5 +1,4 @@
-using Microsoft.AspNetCore.Mvc.Testing;
-using Microsoft.eShopWeb.Web;
+using Microsoft.eShopWeb.Web;
 using Microsoft.eShopWeb.Web.ViewModels;
 using Newtonsoft.Json;
 using System.Linq;

tests/FunctionalTests/Web/Controllers/CatalogControllerIndex.cs

@@ -1,5 +1,4 @@
-using Microsoft.AspNetCore.Mvc.Testing;
-using Microsoft.eShopWeb.Web;
+using Microsoft.eShopWeb.Web;
 using System.Net.Http;
 using System.Threading.Tasks;
 using Xunit;