Merge pull request auth0-blog#7 from enaqx/patch-1

cors module duplicate require

Author: chenkie

server.js

@@ -3,7 +3,6 @@ var logger = require('morgan'),
  http = require('http'),
  express = require('express'),
  errorhandler = require('errorhandler'),
- cors = require('cors'),
  dotenv = require('dotenv'),
  bodyParser = require('body-parser');