def txn_removeAssociation(self, server_url, handle):
        self.db_remove_assoc(server_url, handle)
        return self.cur.rowcount > 0 # -1 is undefined
Remove the association for the given server URL and handle,
dataset/ETHPy150Open CollabQ/CollabQ/openid/store/sqlstore.py/SQLStore.txn_removeAssociation