Removed: unused variables.

Author: rmariuzzo

example-umd/main.js

@@ -12,8 +12,6 @@ var Example = React.createClass({
   },
 
   render: function () {
-    var self = this;
-
     return (
       React.createElement("div", null,
         React.createElement("p", {className: "msg"}, this.state.msg),

example/main.js

@@ -17,8 +17,6 @@ var Example = createReactClass({
   },
 
   render: function () {
-    var self = this;
-
     return (
       <div>
         <p className='msg'>{this.state.msg}</p>