Removing duplicated extension for creating enumerable configuration

src/Microsoft.AspNetCore.Hosting/Internal/IConfigurationExtensions.cs

@@ -1,34 +0,0 @@
-// Copyright (c) .NET Foundation. All rights reserved.
-// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
-
-using System.Collections.Generic;
-using Microsoft.Extensions.Configuration;
-
-namespace Microsoft.AspNetCore.Hosting.Internal
-{
-    public static class IConfigurationExtensions
-    {
-        // Temporary until Configuration/issues/370 is implemented.
-        public static IEnumerable<KeyValuePair<string, string>> GetFlattenedSettings(this IConfiguration configuration)
-        {
-            var stack = new Stack<IConfiguration>();
-            stack.Push(configuration);
-
-            while (stack.Count > 0)
-            {
-                var config = stack.Pop();
-                var section = config as IConfigurationSection;
-
-                if (section != null)
-                {
-                    yield return new KeyValuePair<string, string>(section.Path, section.Value);
-                }
-
-                foreach (var child in config.GetChildren())
-                {
-                    stack.Push(child);
-                }
-            }
-        }
-    }
-}

src/Microsoft.AspNetCore.Hosting/WebHostBuilderExtensions.cs

@@ -24,7 +24,7 @@ namespace Microsoft.AspNetCore.Hosting
 
         public static IWebHostBuilder UseConfiguration(this IWebHostBuilder builder, IConfiguration configuration)
         {
-            foreach (var setting in configuration.GetFlattenedSettings())
+            foreach (var setting in configuration.AsEnumerable())
             {
                 builder.UseSetting(setting.Key, setting.Value);
             }