Mathieu, Mark - did you by any chance have Google account configured in previous distribution releases that you upgraded from? It did not provide much integration with the system but I had it configured nonetheless. It could be that the accounts were stored differently previously and this would explain why was the ~/.config/goa-1.0/accounts.conf file still present after deleting all the Google accounts in "Online Accounts" dialog.
Mathieu, Mark - did you by any chance have Google account configured in previous distribution releases that you upgraded from? It did not provide much integration with the system but I had it configured nonetheless. It could be that the accounts were stored differently previously and this would explain why was the ~/.config/ goa-1.0/ accounts. conf file still present after deleting all the Google accounts in "Online Accounts" dialog.