Where is this script located?

I have a blog at http://www.royalpinehomes.com/

Towards the bottom of the front page HTML source I got 3 scripts it inserts. One is this:

<script type=’text/javascript’ src=’http://www.royalpinehomes.co/wp-admin/js/media-upload.js?ver=3.4′></script&gt;

How do I figure out where or how this script is being inserted into the HTML source? I need to move its location from wp-admin to someplace else so I can add a .htaccess password to wp-admin.

Thanks.