fix: Remove confusing statement about polyfill

Fixes webpack-contrib#7

Author: SpaceK33z

README.md

@@ -11,9 +11,6 @@ var json = require("json!./file.json");
 // => returns file.json content as json parsed object
 ```
 
-Don't forget to polyfill `require` if you want to use it in node.
-See `webpack` documentation.
-
 ## License
 
 MIT (http://www.opensource.org/licenses/mit-license.php)