Update TitleBar.cs

Author: niels9001

CommunityToolkit.App.Shared/Controls/TitleBar/TitleBar.cs

@@ -2,8 +2,6 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using Windows.Media.Audio;
-
 namespace CommunityToolkit.App.Shared.Controls;
 
 [TemplateVisualState(Name = BackButtonVisibleState, GroupName = BackButtonStates)]