move GuardExtensions (#595)

src/ApplicationCore/Exceptions/GuardExtensions.cs

@@ -1,22 +0,0 @@
-using Microsoft.eShopWeb.ApplicationCore.Entities.BasketAggregate;
-using Microsoft.eShopWeb.ApplicationCore.Exceptions;
-using System.Collections.Generic;
-using System.Linq;
-
-namespace Ardalis.GuardClauses
-{
-    public static class BasketGuards
-    {
-        public static void NullBasket(this IGuardClause guardClause, int basketId, Basket basket)
-        {
-            if (basket == null)
-                throw new BasketNotFoundException(basketId);
-        }
-
-        public static void EmptyBasketOnCheckout(this IGuardClause guardClause, IReadOnlyCollection<BasketItem> basketItems)
-        {
-            if (!basketItems.Any())
-                throw new EmptyBasketOnCheckoutException();
-        }
-    }
-}