To remove the "Contacts" button completely from view you'll need to modify a line of code in the file:

Emporium/includes/templates/template_default/common/tpl_header.php

The code line your looking for sits between the lines starting with <!--bof-navigation-display and <!--eof-navigation-display and is the only line with the words "Contact Us" in it.

I can't say exactly what it will read but you need to remove that line of code. It might say something like the following :

<li class="current"><a href="http://irisoriginals.com/Emporium/index.php?main_page=contact_us"><span>Contact Us</span></a></li>

only it probably will have some php coding embedded. Basically to remove "Contact Us" from the display you need to remove everything between (and including) the opening and closing <li></li>

If you want to post the block of code between <!--bof-navigation-display and <!--eof-navigation-display then I can probably tell you what to replace it with.