remove dead file

MediaBrowser.Common/MediaBrowser.Common.csproj

@@ -103,9 +103,6 @@
     <Compile Include="Updates\InstallationEventArgs.cs" />
     <Compile Include="Updates\InstallationFailedEventArgs.cs" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="app.config" />
-  </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\MediaBrowser.Model\MediaBrowser.Model.csproj">
       <Project>{7EEEB4BB-F3E8-48FC-B4C5-70F0FFF8329B}</Project>