Plupload:

- Update to 2.1.9.
- Include the non-minified plupload.js and moxie.js.
- Remove support for Flash and Silverlight, the available runtime options are `html5` and `html4`.
- Delete plupload.flash.swf and plupload.silverlight.xap.

Fixes #41755.
Built from https://develop.svn.wordpress.org/trunk@41328


git-svn-id: http://core.svn.wordpress.org/trunk@41159 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/update-core.php

@@ -712,6 +712,9 @@ $_old_files = array(
 'wp-includes/js/tinymce/skins/lightgray/fonts/tinymce-small.json',
 'wp-includes/js/tinymce/skins/lightgray/fonts/tinymce.json',
 'wp-includes/js/tinymce/skins/lightgray/skin.ie7.min.css',
+// 4.9
+'wp-includes/js/plupload/plupload.flash.swf',
+'wp-includes/js/plupload/plupload.silverlight.xap',
 );
 
 /**