Related Posts plug-in deleted but won't stop displaying content

I was looking for a Related Posts plug-in and tried a couple (Outbrain and maybe one or two others I don’t remember the names of) but deleted them all. However, one still seems to be working, even though it’s been deleted. I can’t figure out how to remove it and I can’t find it in any code.

You can see it displaying thumbnails with no text at the bottom of posts. Here is an example. At the bottom of the page you’ll see small thumbnails between the Contextly and Disqus plug-ins.

Any help would be much appreciated.