remove old OPTIONS default response

relatively useless since its so non-informative,
let me know if anyone has an objection to this,
i think its best to define these for your API

lib/router/index.js

@@ -104,9 +104,6 @@ Router.prototype._dispatch = function(req, res, next){
     // match route
     req.route = route = self.matchRequest(req, i);
 
-    // implied OPTIONS
-    if (!route && 'OPTIONS' == req.method) return self._options(req, res);
-
     // no route
     if (!route) return next(err);
     debug('matched %s %s', route.method, route.path);
@@ -173,41 +170,6 @@ Router.prototype._dispatch = function(req, res, next){
   })(0);
 };
 
-/**
- * Respond to __OPTIONS__ method.
- *
- * @param {IncomingMessage} req
- * @param {ServerResponse} res
- * @api private
- */
-
-Router.prototype._options = function(req, res){
-  var path = parse(req).pathname
-    , body = this._optionsFor(path).join(',');
-  res.set('Allow', body).send(body);
-};
-
-/**
- * Return an array of HTTP verbs or "options" for `path`.
- *
- * @param {String} path
- * @return {Array}
- * @api private
- */
-
-Router.prototype._optionsFor = function(path){
-  var self = this;
-  return methods.filter(function(method){
-    var routes = self.map[method];
-    if (!routes || 'options' == method) return;
-    for (var i = 0, len = routes.length; i < len; ++i) {
-      if (routes[i].match(path)) return true;
-    }
-  }).map(function(method){
-    return method.toUpperCase();
-  });
-};
-
 /**
  * Attempt to match a route for `req`
  * with optional starting index of `i`