remove unneeded classes. #1614

Author: LiorBanai

Analogy/DataProviders/AnalogyBuiltInFactory.cs

@@ -13,6 +13,7 @@
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
+using Analogy.CommonControls.Tools;
 using Analogy.UserControls;
 
 namespace Analogy.DataProviders