diff --git a/src/utils/class.js b/src/utils/class.js
deleted file mode 100644
index 2640865..0000000
--- a/src/utils/class.js
+++ /dev/null
@@ -1,67 +0,0 @@
-/* Simple JavaScript Inheritance
- * By John Resig http://ejohn.org/
- * MIT Licensed.
- * http://ejohn.org/blog/simple-javascript-inheritance/
- */
-// Inspired by base2 and Prototype
-(function(){
-  var initializing = false, fnTest = /xyz/.test(function(){xyz;}) ? /\b_super\b/ : /.*/;
-
-  // The base Class implementation (does nothing)
-  this.Class = function(){};
-  module.exports = Class;
-
-  // Create a new Class that inherits from this class
-  Class.extend = function(prop) {
-    var _super = this.prototype;
-
-    // Instantiate a base class (but only create the instance,
-    // don't run the init constructor)
-    initializing = true;
-    var prototype = new this();
-    initializing = false;
-
-    // Copy the properties over onto the new prototype
-    for (var name in prop) {
-      // Check if we're overwriting an existing function
-      prototype[name] = typeof prop[name] == "function" &&
-        typeof _super[name] == "function" && fnTest.test(prop[name]) ?
-        (function(name, fn){
-          return function() {
-            var tmp = this._super;
-
-            // Add a new ._super() method that is the same method
-            // but on the super-class
-            this._super = _super[name];
-
-            // The method only need to be bound temporarily, so we
-            // remove it when we're done executing
-            var ret = fn.apply(this, arguments);
-            this._super = tmp;
-
-            return ret;
-          };
-        })(name, prop[name]) :
-        prop[name];
-    }
-
-    // The dummy class constructor
-    function Class() {
-      // All construction is actually done in the init method
-      if ( !initializing && this.init )
-        this.init.apply(this, arguments);
-    }
-
-    // Populate our constructed prototype object
-    Class.prototype = prototype;
-
-    // Enforce the constructor to be what we expect
-    Class.prototype.constructor = Class;
-
-    // And make this class extendable
-    Class.extend = arguments.callee;
-
-    return Class;
-  };
-
-})();