Update AppUpdateSideloadService.cs

Author: yaira2

src/Files.App/Services/App/AppUpdateSideloadService.cs

@@ -1,7 +1,6 @@
 // Copyright (c) Files Community
 // Licensed under the MIT License.
 
-using CommunityToolkit.WinUI.Helpers;
 using Microsoft.Extensions.Logging;
 using System.IO;
 using System.Net.Http;