Site looking for font in a directory that doesn't exist

My website (www.cleanmenders.com) is painfully slow on the first load (often times 30+ seconds) and much faster on subsequent loads. When I check it using the tools on pingdom.com and webpagetest.org, the waterfall shows that the site is requesting a font I don’t recognize and it’s looking for it in a directory that doesn’t exist. I made some minor changes to the header.php file (inserted an image), have removed some plugins and added better wp security plugin, but then removed it as well.
Could any of these be the reason it is trying to find this font?

The directory it is trying to find is: https://www.cleanmenders.com/fonts/ColabThi-webfont.woff