WordPress: Do not show plugin update notifications

no-plugin-updates-notifications.php

function run_chk_usr_lvl($matches) {
  global $userdata;
  if (!current_user_can('update_plugins'))  {
    remove_action('admin_notices', 'update_nag', 3);
    remove_action( 'load-update-core.php', 'wp_update_plugins' ); 
  }
}
add_filter('pre_site_transient_update_plugins', create_function( '$a', "return null;" ));
add_action('admin_init', 'run_chk_usr_lvl');