Revert "[Xaml] allow the Previewer to provide their own Xaml files for any type"

This reverts commit 962c8fd352.

Xamarin.Forms.Xaml/IXamlFileProvider.cs

@@ -1,9 +0,0 @@
-using System;
-
-namespace Xamarin.Forms.Xaml
-{
-	public interface IXamlFileProvider
-	{
-		string GetXamlFor(Type type);
-	}
-}

Xamarin.Forms.Xaml/Xamarin.Forms.Xaml.csproj

@@ -81,7 +81,6 @@
     <Compile Include="ExpandMarkupsVisitor.cs" />
     <Compile Include="XamlCompilationAttribute.cs" />
     <Compile Include="TypeArgumentsParser.cs" />
-    <Compile Include="IXamlFileProvider.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>

Xamarin.Forms.Xaml/XamlLoader.cs

@@ -38,8 +38,6 @@ namespace Xamarin.Forms.Xaml
 	internal static class XamlLoader
 	{
 		static readonly Dictionary<Type, string> XamlResources = new Dictionary<Type, string>();
-		internal static bool DoNotThrowOnExceptions { get; set; }
-		internal static IXamlFileProvider XamlFileProvider { get; set; }
 
 		public static void Load(object view, Type callingType)
 		{
@@ -66,16 +64,12 @@ namespace Xamarin.Forms.Xaml
 
 					var rootnode = new RuntimeRootNode (new XmlType (reader.NamespaceURI, reader.Name, null), view, (IXmlNamespaceResolver)reader);
 					XamlParser.ParseXaml (rootnode, reader);
-					Visit (rootnode, new HydratationContext {
-						RootElement = view,
-						DoNotThrowOnExceptions = XamlLoader.DoNotThrowOnExceptions
-					});
+					Visit (rootnode, new HydratationContext { RootElement = view });
 					break;
 				}
 			}
 		}
 
-		[Obsolete ("Use the XamlFileProvider to provide xaml files")]
 		public static object Create (string xaml, bool doNotThrow = false)
 		{
 			object inflatedView = null;
@@ -119,12 +113,6 @@ namespace Xamarin.Forms.Xaml
 
 		static string GetXamlForType(Type type)
 		{
-			string xaml = null;
-
-			//the Previewer might want to provide it's own xaml for this... let them do that
-			if (XamlFileProvider != null && (xaml = XamlFileProvider.GetXamlFor(type)) != null)
-				return xaml;
-
 			var assembly = type.GetTypeInfo().Assembly;
 
 			string resourceId;
@@ -141,6 +129,7 @@ namespace Xamarin.Forms.Xaml
 
 			// first pass, pray to find it because the user named it correctly
 
+			string xaml = null;
 			foreach (var resource in resourceNames)
 			{
 				if (ResourceMatchesFilename(assembly, resource, likelyResourceName))