Deletes a Floating IP and removes it from the account.

def destroy_floating_ip(self, ip_addr):
        """
        Deletes a Floating IP and removes it from the account.
        """
        if self.api_version == 2:
            self.request('/floating_ips/' + ip_addr, method='DELETE')
        else:
            raise DoError(v2_api_required_str)