Remove Helios from the Mvc.Client sample

samples/Mvc.Client/project.json

@@ -8,7 +8,6 @@
         "Microsoft.AspNet.Mvc": "6.0.0-*",
         "Microsoft.AspNet.Authentication.Cookies": "1.0.0-*",
         "Microsoft.AspNet.Authentication.OpenIdConnect": "1.0.0-*",
-        "Microsoft.AspNet.Server.IIS": "1.0.0-*",
         "Microsoft.AspNet.Server.Kestrel": "1.0.0-*",
         "Microsoft.AspNet.Server.WebListener": "1.0.0-*",
         "Microsoft.AspNet.StaticFiles": "1.0.0-*",