function plt_hide_easy_tinymce_editor_add_button_menus() {
//Hide the "Settings → TinyMCE addButton" menu.
remove_submenu_page('options-general.php', 'easy-tinymce-editor-add-button');
}
add_action('admin_menu', 'plt_hide_easy_tinymce_editor_add_button_menus', 11);