Since I use git on a lot of my projects, I don’t want to update WordPress in the production environment. So I wrote a few lines of code, that hides the update message. Add it to functions.php if you want to use it.

	// Hide update nag on the production server
	$production = 'http://PRODUCTIONURL.com';
	$check_url = home_url();
	function hideUpdateNag() {
	remove_action( 'admin_notices', 'update_nag', 3 );
	}
	if ( $production == $check_url ) {
	add_action('admin_menu','hideUpdateNag');
	}

view raw functions.php hosted with by GitHub

If you find some issues, or have some great ideas on how to improve it, just fork the gist.