Merge pull request #371 from zensh/master

remove unnecessary "require('http')"

lib/response.js

@@ -13,7 +13,6 @@ var typeis = require('type-is').is;
 var statuses = require('statuses');
 var destroy = require('destroy');
 var assert = require('assert');
-var http = require('http');
 var path = require('path');
 var vary = require('vary');
 var basename = path.basename;