diff --git a/wp-admin/includes/update-core.php b/wp-admin/includes/update-core.php
index 703ee05857..1d5fd8d2ae 100644
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -551,6 +551,8 @@ $_old_files = array(
 'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/ui.css',
 // 3.5.2
 'wp-includes/js/swfupload/swfupload-all.js',
+// 3.6
+'wp-admin/js/revisions-js.php',
 );
 
 /**
diff --git a/wp-admin/js/revisions-js.php b/wp-admin/js/revisions-js.php
deleted file mode 100644
index b262e00830..0000000000
--- a/wp-admin/js/revisions-js.php
+++ /dev/null
@@ -1,39 +0,0 @@
-<?php
-
-// The JS here is purposefully obfuscated to preserve mystery and romance.
-// If you want to see behind the curtain, visit http://core.trac.wordpress.org/ticket/15262
-
-if ( !defined( 'ABSPATH' ) )
-	exit;
-
-/** @ignore */
-function dvortr( $str ) {
-	return strtr(
-		$str,
-		'\',.pyfgcrl/=\\aoeuidhtns-;qjkxbmwvz"<>PYFGCRL?+|AOEUIDHTNS_:QJKXBMWVZ[]',
-		'qwertyuiop[]\\asdfghjkl;\'zxcvbnm,./QWERTYUIOP{}|ASDFGHJKL:"ZXCVBNM<>?-='
-	);
-}
-
-$j = esc_url( site_url( '/wp-includes/js/jquery/jquery.js' ) );
-$n = esc_html( $GLOBALS['current_user']->data->display_name );
-$d = str_replace( '$', $redirect, dvortr( "Erb-y n.y ydco dall.b aiacbv Wa ce]-irxajt- dp.u]-$-VIr XajtWzaVv" ) );
-
-wp_die( <<<EOEE
-<style type="text/css">
-html body { font-family: courier, monospace; }
-#hal { text-decoration: blink; }
-</style>
-<script type="text/javascript" src="$j"></script>
-<script type="text/javascript">
-/* <![CDATA[ */
-var n = '$n';
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-/* ]]> */
-</script>
-<span id="noscript">$d</span>
-<blink id="hal">&#x258c;</blink>
-EOEE
-,
-dvortr( 'Eabi.p!' )
-);