removed msbuild integerated nuget restore

src/Microsoft.AspNet.SignalR.Owin/Microsoft.AspNet.SignalR.Owin.csproj

@@ -102,7 +102,6 @@
   </ItemGroup>
   <Import Project="..\Common\Microsoft.AspNet.SignalR.targets" />
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
-  <Import Project="$(SolutionDir)\.nuget\NuGet.targets" Condition="Exists('$(SolutionDir)\.nuget\NuGet.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.
   <Target Name="BeforeBuild">
@@ -110,4 +109,4 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-</Project>
+</Project>