Remove the banner when concatenating TinyMCE so wp-tinymce.js.gz doesn't change every time the build process is run. See #25159.
Built from https://develop.svn.wordpress.org/trunk@25200


git-svn-id: http://core.svn.wordpress.org/trunk@25172 1a063a9b-81f0-0310-95a4-ce76da25c4cd