XF 1.3 Where can I find this widget call, in my instance?

Dear xenForo community,

I was wondering if you could help me with a very dumb problem: actually, I am not able to find where this "Live, da twitter" widget in my sidebar is coming from.

This is my xenForo URL:

I've not been able to find it into the sidebar_share_page template, not even into all those "sidebar_*" ones, so I'm asking for you help :)

Thanks for your time and take care,