[Call for Review] Removing passed example of "'aria-hidden, has no focusable content"

https://github.com/act-rules/act-rules.github.io/pull/1719

This removes an example which was similar to an existing one and could be interpreted as bad coding practice.

This will require a 1-week call for review.

Best,
--

Daniel Montalvo

Accessibility Education and Training Specialist
W3C/WAI