remove: dead article link (#1168)

Author: igormartimiano

README.md

@@ -591,7 +591,6 @@ You can deploy JSON Server. For example, [JSONPlaceholder](http://jsonplaceholde
 ### Articles
 
 * [Node Module Of The Week - json-server](http://nmotw.in/json-server/)
-* [Mock up your REST API with JSON Server](http://www.betterpixels.co.uk/projects/2015/05/09/mock-up-your-rest-api-with-json-server/)
 * [ng-admin: Add an AngularJS admin GUI to any RESTful API](http://marmelab.com/blog/2014/09/15/easy-backend-for-your-restful-api.html)
 * [Fast prototyping using Restangular and Json-server](https://glebbahmutov.com/blog/fast-prototyping-restangular-and-json-server/)
 * [Create a Mock REST API in Seconds for Prototyping your Frontend](https://coligo.io/create-mock-rest-api-with-json-server/)