Update Microsoft.Toolkit.Uwp.UI/Extensions/TextBoxMask/TextBoxMask.cs

Co-authored-by: Rosario Pulella <[email protected]>

Author: michael-hawker

Microsoft.Toolkit.Uwp.UI/Extensions/TextBoxMask/TextBoxMask.cs

@@ -6,7 +6,6 @@
 using System.Collections.Generic;
 using System.Text;
 using System.Text.RegularExpressions;
-
 using Windows.ApplicationModel.DataTransfer;
 using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;