U4-11556 V8 - Removed metablogConfig.config

http://issues.umbraco.org/issue/U4-11556

For v7, I've marked the `SystemFiles.MetablogConfig` strings as deprecated.

src/Umbraco.Core/IO/SystemFiles.cs

@@ -37,6 +37,7 @@ namespace Umbraco.Core.IO
             }
         }
 
+        [Obsolete("This file is no longer used and should not be accessed!")]
         public static string MetablogConfig
         {
             get

src/Umbraco.Web.UI/Umbraco.Web.UI.csproj

@@ -561,9 +561,6 @@
     <None Include="Config\scripting.Release.config">
       <DependentUpon>scripting.config</DependentUpon>
     </None>
-    <None Include="Config\metablogConfig.Release.config">
-      <DependentUpon>metablogConfig.config</DependentUpon>
-    </None>
     <None Include="Config\ExamineSettings.Release.config">
       <DependentUpon>ExamineSettings.config</DependentUpon>
     </None>
@@ -993,7 +990,6 @@
     <Content Include="Config\Dashboard.config">
       <SubType>Designer</SubType>
     </Content>
-    <Content Include="Config\metablogConfig.config" />
     <Content Include="Config\tinyMceConfig.config">
       <SubType>Designer</SubType>
     </Content>

src/Umbraco.Web.UI/config/metablogConfig.Release.config

@@ -1,3 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<metablogapi>
-</metablogapi>

src/Umbraco.Web.UI/config/metablogConfig.config

@@ -1,19 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<metablogapi>
-  <channel>
-    <name>My FAQs</name>
-    <user>0</user>
-    <startNode>1080</startNode>
-    <fullTree>False</fullTree>
-    <documentTypeAlias>Articulate</documentTypeAlias>
-    <fields>
-      <categories>
-      </categories>
-      <description>
-      </description>
-      <excerpt>
-      </excerpt>
-    </fields>
-    <mediaObjectSupport enabled="True" folderId="-1" mediaTypeAlias="Image" mediaTypeFileProperty="umbracoFile" />
-  </channel>
-</metablogapi>

src/umbraco.businesslogic/IO/SystemFiles.cs

@@ -29,6 +29,7 @@ namespace umbraco.IO
 			get { return Umbraco.Core.IO.SystemFiles.TinyMceConfig; }
 		}
 
+        [Obsolete("This file is no longer used and should not be accessed!")]
 		public static string MetablogConfig
 		{
 			get { return Umbraco.Core.IO.SystemFiles.MetablogConfig; }