How do I remove this sticky event/announcement banner?

Hello and welcome @hellobudha :slight_smile:

I think you mean this bit rather than the Welcome Banner:

If so, I don’t think the AI answer is going to be much use @EricGT :frowning:

Is that your admin view @hellobudha? If not, you may see an ‘edit’ link which will take you to the topic itself where you can Un-Pin it from your topic wrench: