diff --git a/static/main.js b/static/main.js
index 1dc522e10..2202c048a 100644
--- a/static/main.js
+++ b/static/main.js
@@ -65,19 +65,6 @@ var hasUIBeenReset = false;
 var simpleCooks = new SimpleCook();
 var historyWidget = new HistoryWidget();
 
-// Polyfill includes for IE11 - From MDN
-if (!String.prototype.includes) {
-    String.prototype.includes = function (search, start) {
-        if (search instanceof RegExp) {
-            throw TypeError('first argument must not be a RegExp');
-        }
-        if (start === undefined) {
-            start = 0;
-        }
-        return this.indexOf(search, start) !== -1;
-    };
-}
-
 function setupSettings(hub) {
     var eventHub = hub.layout.eventHub;
     var defaultSettings = {