The next line only removes the last `<math>` tag on the page (aka, the rats nest), but it is fragile and would remove legitimate `<math>` tags on the page if the Modernizr.mathml test was fixed and the complete handler wasn't removed.

As a safety check, I could make sure the `<math>` element I'm about to remove matches their test element structure, but I was erring on the side of less code.