Hey Geoff,
I’m following this thread as I’m trying to do the same thing as Ed. I’ve tried the CSS code you’ve listed (.tribe-events-tickets .tribe-tickets-remaining (display:none !important;}) and had the same issue. I then tried turning off all of my plug-ins to see if I had a cache issue, and that didn’t solve the issue either.
Any other thoughts on what I might be able to do to remove the “Quantity Remaining” text under the ticket box?