From b425f74ef4da148ae736baf58f8c6c0e9fccc4b6 Mon Sep 17 00:00:00 2001
From: Jeff Atwood <jatwood@codinghorror.com>
Date: Sat, 2 Jan 2016 23:51:03 -0800
Subject: [PATCH] missed an IE9 removal

---
 .../javascripts/discourse/initializers/focus-event.js.es6     | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/app/assets/javascripts/discourse/initializers/focus-event.js.es6 b/app/assets/javascripts/discourse/initializers/focus-event.js.es6
index 225745b20..35195217d 100644
--- a/app/assets/javascripts/discourse/initializers/focus-event.js.es6
+++ b/app/assets/javascripts/discourse/initializers/focus-event.js.es6
@@ -58,10 +58,6 @@ export default {
     else if ((hidden = 'msHidden') in document) {
         document.addEventListener('msvisibilitychange', onchange);
     }
-    // IE 9 and lower:
-    else if ('onfocusin' in document) {
-        document.onfocusin = document.onfocusout = onchange;
-    }
     // All others (including iPad which is a bit weird and gives onpageshow / hide
     else {
         window.onpageshow = window.onpagehide = window.onfocus = window.onblur = onchange;