wp_update_plugins

Can I comment out

wp_update_plugins

in the update.php file to get WP to stop the automatic updates for plugins? I got screwed when it updated Contact Form 7 without my knowledge. The rest of the subroutine looks like this:

function _maybe_update_plugins() {
	$current = get_site_transient( 'update_plugins' );
	if ( isset( $current->last_checked ) && 43200 > ( time() - $current->last_checked ) )
		return;
	wp_update_plugins();

Any help is appreciated.