remove tinymce filters

<?php
/*
Plugin Name: Espresso Disable Extra Editor Buttons
Plugin URI: http://github.com/
Description: This plugin will fix a theme compatibility issue with the Event Espresso event editor
Version: 1.0
Author: Josh Feck
Author URI: http://eventespresso.com
License: GPLv2
*/

/*  Copyright 2013  Josh Feck

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

function ee_remove_stuff() {
     remove_filter('mce_external_plugins', 'add_plugin');
     remove_filter('mce_buttons_3', 'register_button_3');
     remove_filter('mce_buttons_4', 'register_button_4');
}
add_action('init', 'ee_remove_stuff', 50);


/*-----------------------------------------------------------------------------------*/
/* Add TinyMCE Buttons to Editor */
/*-----------------------------------------------------------------------------------*/
add_action('admin_head', 'ee_add_button');

function ee_add_button() {

$screen = get_current_screen();
if($screen->action == "add" || $screen->action == "edit") {

   if ( current_user_can('edit_posts') &&  current_user_can('edit_pages') )
   {
     add_filter('mce_external_plugins', 'add_plugin');
     add_filter('mce_buttons_3', 'register_button_3');
     add_filter('mce_buttons_4', 'register_button_4');
   }
}
}