Can't Locate Where This Code Is Being Added In

At some point, our website, Wellbuzz.com, had two profile ids for AddThis added to it. I am trying to remove the following profile id from our code as you can only have once publisher Id per page.

<script type="text/javascript" src="https://s7.addthis.com/js/300/addthis_widget.js#pubid=ra-558ac14e7f79bff7"></script>

When I view the source of a page on WellBuzz.com (such as the home page), you can find that code on the page. However, I can't figure out where it is being added and how to remove it.

We have found the other user id in the Genesis theme Simple hooks (this url wellbuzz.com/wp-admin/admin.php?page=simplehooks ) in wp_footer Hook section. But the publisher id there is the one that we want to keep (pubid=ra-550c6e117ee9ee13)

<!-- Go to http://www.addthis.com/dashboard to customize your tools -->
<script type="text/javascript" src="//s7.addthis.com/js/300/addthis_widget.js#pubid=ra-550c6e117ee9ee13" async="async"></script>

Can you please let me know where I can find and remove the code for the publisher id pubid=ra-558ac14e7f79bff7? If it helps, I am granting wpmu support access via the dashboard.

Thanks for your help!