Identify unwanted code about bitcore-node HOT 5 CLOSED

  if (config.enableEmailstore) {
    var allowCopayCrossDomain = function(req, res, next) {
      if ('OPTIONS' == req.method) {
        res.send(200);
        res.end();
        return;
      }
      next();
    }
    app.use(allowCopayCrossDomain);
  }

if (config.publicPath) {
    var staticPath = path.normalize(config.rootPath + '/../' + config.publicPath);
    //IMPORTANT: for html5mode, this line must to be before app.router
    app.use(express.static(staticPath));
  }

res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,Content-Type,Authorization');
res.setHeader('Access-Control-Expose-Headers', 'X-Email-Needs-Validation,X-Quota-Per-Item,X-Quota-Items-Limit,X-RateLimit-Limit,X-RateLimit-Remaining');

  // Currency
  var currency = require('../app/controllers/currency');
  app.get(apiPrefix + '/currency', currency.index);

  app.get('*', index.render);

exports.render = function(req, res) {

  if (config.publicPath) {
    return res.sendfile(config.publicPath + '/index.html');
  }
  else {
    var version = _getVersion();
    res.send('bitcore-node API v' + version);
  }
};