Thank you for creating a new ticket.
So the reason why it was not working is that was for the photo view first and then the list view.
Each view of the Events Calendar has a different template.
For the single view please use the following css:
.single-tribe_events #tribe-events-content #tribe-events-header {
display:none;
}
Add that css to your theme’s stylesheet or through a plugin such as Simple Custom CSS.
Let me know if that helps.
If that does not work, please a direct link to the page you are trying to edit so we can be on the same page 🙂
Thanks