Remove more obsolete from MasterDetailPage

Author: rmarinho

src/Compatibility/ControlGallery/src/Android/CustomRenderers.cs

@@ -183,14 +183,13 @@ public AttachedStateEffectLabelRenderer(Context context) : base(context)
 		}
 	}
 
-	public class NativeDroidFlyoutPage : Microsoft.Maui.Controls.Compatibility.Platform.Android.AppCompat.MasterDetailPageRenderer
+	public class NativeDroidFlyoutPage : FlyoutPageRenderer
 	{
 		FlyoutPage _page;
 		bool _disposed;
 
 		public NativeDroidFlyoutPage(Context context) : base(context)
 		{
-			System.Diagnostics.Debug.WriteLine($">>>>> NativeDroidMasterDetail NativeDroidMasterDetail 53: This is the obsolete constructor being selected");
 		}
 
 		protected override void OnElementChanged(VisualElement oldElement, VisualElement newElement)

src/Compatibility/ControlGallery/src/iOS/RegistrarValidationService.cs

@@ -19,23 +19,6 @@ public bool Validate(VisualElement element, out string message)
 
 			var renderer = Platform.iOS.Platform.CreateRenderer(element);
 
-#pragma warning disable CS0618 // Type or member is obsolete
-			if (element is MasterDetailPage)
-			{
-				if (renderer == null
-					|| renderer.GetType().Name == "DefaultRenderer"
-					|| (Device.Idiom == TargetIdiom.Tablet && !(renderer is TabletMasterDetailRenderer))
-					|| (Device.Idiom == TargetIdiom.Phone && !(renderer is PhoneMasterDetailRenderer))
-					)
-				{
-					message = $"Failed to load proper iOS renderer for {element.GetType().Name}";
-					return false;
-				}
-
-				return true;
-			}
-#pragma warning restore CS0618 // Type or member is obsolete
-
 			if (renderer == null
 				|| renderer.GetType().Name == "DefaultRenderer"
 				|| (element is FlyoutPage && Device.Idiom == TargetIdiom.Tablet && !(renderer is TabletFlyoutPageRenderer))

src/Compatibility/Core/src/Android/AppCompat/FlyoutPageRenderer.cs

@@ -498,13 +498,3 @@ void UpdateSplitViewLayout()
 		}
 	}
 }
-
-namespace Microsoft.Maui.Controls.Compatibility.Platform.Android.AppCompat
-{
-	public class MasterDetailPageRenderer : FlyoutPageRenderer
-	{
-		public MasterDetailPageRenderer(Context context) : base(context)
-		{
-		}
-	}
-}