The headline text in the banner area isn't default text as much as it is key information about your event automatically rendered into the banner space; there isn't a way to hide that right now.
The community sites offer a new way to think about how event pages work. We suggest taking a different approach to what your event banner does for your event page experience.
The guidance we've been offering other teams is:
consider imagery that represents the community and is engaging without offering key information (information in pictures isn't really helpful to users who have disabilities and rely on screen readers)
consider imagery that adds to the experience rather than repeating information the platform generates for you automatically
- consider imagery that doesn't rely on a specific screen size to work. For example, a particular image that works on a full screen browser on my laptop might not work for other laptops and screen sizes, even without the text information overlay.