How to delete multiple payments at once?

How to delete multiple payments at once?

I want to change the the account that the payments were deposited from "Undeposited Funds" to a new account that I created to represent my Bank.

I have 200+ Payments and I can change them all by exporting the data to excel and attempt to import it.

It would only make sense that I delete my payments after I export them inorder to import the modified data; however, I do not want to delete them one at a time.

If I cannot delete  multiple payments (in my case, all of them) at once, how can I quickly edited in batch the payments that I have previously inputed.

Thanks.