Removing unused namespaces

src/Microsoft.AspNet.Mvc.Core/MvcOptions.cs

@@ -4,7 +4,6 @@
 using System;
 using System.Collections.Generic;
 using Microsoft.AspNet.Mvc.Core;
-using Microsoft.AspNet.Mvc.ModelBinding;
 using Microsoft.AspNet.Mvc.OptionDescriptors;
 using Microsoft.AspNet.Mvc.ReflectedModelBuilder;