Hide plugin update messages for a WordPress plugin

hide-plugin-update-messages.php

<?php

/**
 * Hide Plugin Update Messages for this plugin
 */
add_filter( 'http_request_args', 'hide_plugin_update_messages', 10, 2 );
function hide_plugin_update_messages( $r, $url ) {
	if ( 0 === strpos( $url, 'http://api.wordpress.org/plugins/update-check/' ) ) {
		$my_plugin = plugin_basename( __FILE__ );
		$plugins = unserialize( $r['body']['plugins'] );
		unset( $plugins->plugins[$my_plugin] );
		unset( $plugins->active[array_search( $my_plugin, $plugins->active )] );
		$r['body']['plugins'] = serialize( $plugins );
	}
	return $r;
}

?>