Ultimate Facebook Remove Blog Creation Fields


I want to remove the Blog Creation Fields from the Ultimate Facebook Registration form, so that no blog will be created on registration.

I tried by commenting following lines in the wdfb_utilities.php:

if ($wp_grant_blog) {
$fields[] = array(
'name' => 'blog_title',
'description' => __('Your blog title', 'wdfb'),
'type' => 'text',
$newdomain = is_subdomain_install()
? 'youraddress.' . preg_replace('|^www\.|', '', $current_site->domain)
: $current_site->domain . $current_site->path . 'youraddress'
$fields[] = array(
'name' => 'blog_domain',
'description' => sprintf(__('Your blog address (%s)', 'wdfb'), $newdomain),
'type' => 'text',

But it only removes the fields and still checks for the fields, so that I can't register because of an empty name. How can I resolve this?