Remove unused code

plugins/dynamix/include/HideFormatButton.php

@@ -1,21 +0,0 @@
-<?PHP
-/* Copyright 2005-2017, Lime Technology
- * Copyright 2012-2017, Bergware International.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version 2,
- * as published by the Free Software Foundation.
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- */
-?>
-<?
-$hide = '/var/tmp/hide_format_button.tmp';
-$flag = file_exists($hide);
-
-switch ($_POST['hide']) {
-  case 'yes': if (!$flag) touch($hide); break;
-  case 'no' : if ($flag) unlink($hide); break;
-}
-?>