No, we can’t. But you can do it yourself.
You know what they say: "Give a man a fish, and you'll feed him for a day. Don't teach a man to fish and feed yourself. He's a grown man. Fishing's not that hard..."
Just tap the (...) button in the app, and you can edit a board’s details or just delete the whole shebang. This is the only way to delete a board, and it is permanent and removes all the items it contains. There's no way for us to retrieve any content that's been removed.
Please note that if you've shared your board with Edit access, anyone invited to that board can delete it for everyone.