[David]

With some digging, I found the php files that the offending urls (Google Fonts and one other…different php file for each) were hiding in. I followed the instructions on creating a child theme, but couldn’t grasp how to unhook and re-hook the part that printed the urls into the final html. So I edited the parent theme files by changing the prefix to https:// and now I no longer get the annoying warnings in IE.