Fixed app.config reference.

Author: jonathanbennett73

TextEncodingDetect-C#/TextEncodingDetect/App.config

@@ -49,9 +49,6 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="TextEncodingDetect.cs" />
   </ItemGroup>
-  <ItemGroup>
-    <None Include="app.config" />
-  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
        Other similar extension points exist, see Microsoft.Common.targets.