Removed unnecesry directives

Author: luismts

AppTrackingTransparency.iOS/AppTrackingTransparencyPermission.cs

@@ -1,10 +1,6 @@
-using Foundation;
-using System;
+using System;
 using System.Collections.Generic;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
-using UIKit;
 using Xamarin.Essentials;
 using XEssentialsTest.Extensions;
 using static Xamarin.Essentials.Permissions;

AppTrackingTransparency/Extensions/IPermission.cs

@@ -1,7 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Threading.Tasks;
+using System.Threading.Tasks;
 using Xamarin.Essentials;
 
 namespace XEssentialsTest.Extensions