cleanup

MvvmCommunityApp/MainWindow.xaml.cs

@@ -4,16 +4,8 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
 using System.Windows;
-using System.Windows.Controls;
+
-using System.Windows.Data;
-using System.Windows.Documents;
-using System.Windows.Input;
-using System.Windows.Media;
-using System.Windows.Media.Imaging;
-using System.Windows.Navigation;
-using System.Windows.Shapes;
 
 namespace MvvmCommunityApp
 {