When new wordpress version came. we got message in wordpress admin panel as follows:

WordPress ….. is available! Please update.

Many people does not want to see that message or hide this message from wordpress admin panel

Just Open functions.php file from wordpres theme and put following code in that file:

add_action('admin_menu','hide_update_message');
 function hide_update_message()
 {
 remove_action( 'admin_notices', 'update_nag', 3 );
remove_filter( 'update_footer', 'core_update_footer' );

}

This code will run in wordpress and wordpressMU also.

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