Remove the script from the header.

Hello, today I found some script in the head that I don't know where it came from

<script type="text/javascript" src="http://shpr.co/code/fsave/js/fs.js?subid=782&ex=35&uid=5160fc31df8ee0.55679468">

This script doesn't load at all and it's slowing down the browsers. I just need to remove it; where can I find the list of head elements? I've searched a bit but can't seem to find it?