Replace local copy of TimerMixin with module from npm.

Reviewed By: spicyj, davidaurelio

Differential Revision: D3819543

fbshipit-source-id: 69d68a7653fce05a31cbfd61e48878b7a0a2ab51

Libraries/Components/LazyRenderer.js

@@ -11,7 +11,7 @@
 'use strict';
 
 var React = require('React');
-var TimerMixin = require('TimerMixin');
+var TimerMixin = require('react-timer-mixin');
 
 var LazyRenderer = React.createClass({
   mixin: [TimerMixin],