Hi,
Sure! It is added via the wp-content/plugins/ajax-search-pro/backend/tinymce/buttons.php file. You will need to either edit that (remove the contents and leave only the first line), or perhaps try this custom code in the functions.php file in the theme directory:
remove_action('admin_head', 'wpdreams_asp_add_mce_button');
remove_action('admin_head', 'wpdreams_asp_mce_generate_variable');..altough I am not sure if this code will work.