In case you need to hide the plugin update count (can’t/don’t want to update yet) you can hide it with this. Can be especially useful if you don’t want clients to wander over the the update area.
add_action('admin_menu', 'remove_plugin_update_count');
function remove_plugin_update_count(){
global $menu, $submenu;
$menu[65][0] = 'Plugins';
$submenu['index.php'][10][0] = 'Updates';
}