You can delete or hide accounts that you do not want to see in the account list:
Hide an account:
'Accounts'> 'Select account'> 'Select dropdown next to the account'> 'Hide this account'
Delete an account:
'Accounts'> 'Select account'> 'Select dropdown next to the account'> 'scroll down' > 'Delete this account'
or
'Settings'> 'Select bank access' > 'Select account' > 'Delete this account'