[balinor]

If you look at customer/top_menu.tpl, you'll see this:

{$lng.lbl_phone_1_title}: {$config.Company.company_phone}

This is the text variable that says 'US Toll Free' - {$lng.lbl_phone_1_title}:

You can either remove it in the template, change it via the 'Languages' area, or edit it directly using Webmaster Mode.