Disable WordPress update notification

// hide update notifications
function remove_core_updates(){
    global $wp_version;return(object) array('last_checked'=> time(),'version_checked'=> $wp_version,);
}
add_filter('pre_site_transient_update_core','remove_core_updates'); //hide updates for WordPress itself
add_filter('pre_site_transient_update_plugins','remove_core_updates'); //hide updates for all plugins
add_filter('pre_site_transient_update_themes','remove_core_updates'); //hide updates for all themes

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