Need help fixing argument for wpdb::prepare

Hi all, i need some help to fix this warning from a plugin which seems the author didnt release the fix has he mentioned at 2 years ago:

Warning: Missing argument 2 for wpdb::prepare(), called in /home/edited/public_html/www/edited.com/wp-content/plugins/tt_cloudflare_wpmu/tt_cloudflare_wpmu.php on line 176 and defined in /home/edited/public_html/www/edited.com/wp-includes/wp-db.php on line 1210

global $wpdb,$table_prefix;
/* line 176 starts here*/ $blog_list = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM ".$table_prefix."blogs ORDER BY blog_id" ) );
//print_r($blog_list);
//$blog_list = get_blog_list( 0, 'all' );
$blog_count=0;
foreach ($blog_list as $blog) {$blog_count++;}
echo 'There are currently '.$blog_count.' blogs running on this server.';
?>

I tried to follow some examples in wordpress forum but i didnt got any success to fix this warning, the author says this is not going to cause any conflict or security issue, and he also said was going to fix it in next release which never happened.