Comment 1 for bug 692785

You can create a simple plugin like this:
---
<?php
/*
Plugin Name: LoCo Stuff
Author: Your LoCo
*/

function ourloco_remove_search() {
 $result = remove_action( 'ubuntu_loco_search', 'ubuntu_loco_add_search' );
}
add_action( 'wp_head', 'ourloco_remove_search' );
?>
---

Check the rev.22