refactor tips

app/scripts/main.js

@@ -1,27 +1,9 @@
 var React = require('react'),
     App  = require('./App');
 
-var showName = (e) => {
-    var el = e.toElement;
-    el.parentNode.classList.add('visible');
-};
 
-var hideName = (e) => {
-    var el = e.fromElement;
-    el.parentNode.classList.remove('visible');
-};
-
-
-var enableTips = () => {
-    var elems = document.querySelectorAll('.logo-item img');
-    for (var i = 0; i < elems.length; i++) {
-        elems[i].addEventListener("mouseenter", showName, false);
-        elems[i].addEventListener("mouseleave", hideName, false);
-    }
-};
 
 document.addEventListener('DOMContentLoaded', function () {
     React.render(<App/>, document.getElementById('react'));
-    enableTips();
 });