Remove plugin update nags

remove-update-nag.php

<?php
//https://dd32.id.au/2011/03/01/disable-plugin-update-notification-for-a-specific-plugin-in-wordpress-3-1/
add_filter( 'site_transient_update_plugins', 'dd_remove_update_nag' );
function dd_remove_update_nag( $value ) {
	$hide_update_nags = array(
		'akismet/akismet.php',  
	);
	foreach ( $hide_update_nags as $plugin ) {
		if ( isset( $value->response[ $plugin ] ) ) {
			unset( $value->response[ $plugin ] );
		}
	}

	return $value;
}