Patrick, I’ll copy and paste that link’s response for you here:
I didn’t see a filter to remove that via PHP so here’s some CSS to hide it so users shouldn’t see:
body.single-tribe_events tr.tribe-tickets-attendees-list-optout {
display: none;
}
You can add custom CSS code via your child theme’s style.css file or via a plugin like Simple Custom CSS or, my favorite, Jetpack. Jetpack supports regular CSS and the LESS and Sass pre-processors.
If you’re not a CSS expert, Jetpack’s Custom Design reference may prove helpful.
Please let me know how it goes for you.