removes the reference to Yavsc.Api

Since it's a build for dnx451 only, it is useless

Yavsc/project.json

@@ -45,7 +45,6 @@
     "defaultNamespace": "Yavsc"
   },
   "dependencies": {
-    "Yavsc.Api": "1.0.0",
     "EntityFramework.Commands": "7.0.0-rc1-*",
     "EntityFramework.Core": "7.0.0-rc1-*",
     "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-*",
@@ -105,7 +104,8 @@
     "PayPalButtonManagerSDK": "2.10.109",
     "Microsoft.AspNet.Authentication.OAuth": "1.0.0-rc1-final",
     "Microsoft.AspNet.Mvc.Formatters.Json": "6.0.0-rc1-final",
-    "Microsoft.AspNet.OWin": "1.0.0-rc1-final"
+    "Microsoft.AspNet.OWin": "1.0.0-rc1-final",
+    "System.Json": "4.0.20126.16343"
   },
   "commands": {
     "web": "Microsoft.AspNet.Server.Kestrel --server.urls http://*:5000",