While we don't have the option to disable the undeposited funds account at this time, you can be sure to choose a different account when receiving payments. The undeposited fund's account is a pre-generated account made by QuickBooks. This account is unique because it's a temporary account that QuickBooks uses to hold received payments from invoices before you deposit them in the bank.
Here's how to choose another account:
From the receive payment window, click on the Deposit to dropdown.
Choose which account you'd like to deposit the funds in.
You can learn more about the undeposited funds account in the help articles I've included below.