Revert "Add :focus-within support to menus"
Revert "Add :focus-within support to menus"

This reverts commit caa2c4102b1358a9deb359827f4f558e0131d505.

It doesn't graceful degrade, so I can't use it :(

JacobDB/new-site,revxx14/new-site,revxx14/new-site,JacobDB/new-site,JacobDB/new-site