Hi ​@Heidi18715 - Thanks for reaching out!

The Seats Filled wording is only on the hosts calendar instance. As an example, the Invitees would only see the event title you’ve set for the meeting. I booked a test event with myself here;
 

In the hosts case, this is what the Host will see on their calendar:
 

At this time, there is not a way to remove this from the hosts end, but I can forward this on to our product team for review!

Let me know if you have any questions!