remove non-existent file references from csproj

Author: Jasmine

src/GitHub.App/GitHub.App.csproj

@@ -117,8 +117,6 @@
     <Compile Include="Caches\ImageCache.cs" />
     <Compile Include="Extensions\AkavacheExtensions.cs" />
     <Compile Include="Extensions\EnvironmentExtensions.cs" />
-    <Compile Include="Extensions\ValidationExtensions.cs" />
-    <Compile Include="Factories\UIFactory.cs" />
     <Compile Include="GlobalSuppressions.cs" />
     <Compile Include="Infrastructure\LoggingConfiguration.cs" />
     <Compile Include="Models\PullRequestModel.cs" />
@@ -283,11 +281,11 @@
   </Target>
   <Import Project="..\..\packages\Fody.1.28.0\build\Fody.targets" Condition="Exists('..\..\packages\Fody.1.28.0\build\Fody.targets')" />
   <Import Project="..\..\packages\SQLitePCL.raw_basic.0.7.3.0-vs2012\build\net45\SQLitePCL.raw_basic.targets" Condition="Exists('..\..\packages\SQLitePCL.raw_basic.0.7.3.0-vs2012\build\net45\SQLitePCL.raw_basic.targets')" />
-  <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
+  <!-- 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.
   <Target Name="BeforeBuild">
   </Target>
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>