Disabling tooltip on menu items

Here’s the code to remove it from wp_page_menu(), wp_nav_menu() and wp_list_categories() function:

function my_menu_notitle( $menu ){
  return $menu = preg_replace('/ title=\"(.*?)\"https://wordpress.stackexchange.com/", '', $menu );

}
add_filter( 'wp_nav_menu', 'my_menu_notitle' );
add_filter( 'wp_page_menu', 'my_menu_notitle' );
add_filter( 'wp_list_categories', 'my_menu_notitle' );

Source