De-allocate a floating IP

        .. versionadded:: 2016.3.0

def floating_ip_delete(self, floating_ip):
        '''
        De-allocate a floating IP

        .. versionadded:: 2016.3.0
        '''
        ip = self.floating_ip_show(floating_ip)
        nt_ks = self.compute_conn
        return nt_ks.floating_ips.delete(ip)