docs: def remove(self, address):
          """Remove *address* from the subscribing list for *topics*.
          """
          with self._lock:
              try:
                  subscriber = self.addr_sub[address]
              except KeyError:
                  return False
              LOGGER.info("Subscriber removing address %s", str(address))
              if self.poller:
                  self.poller.unregister(subscriber)
              del self.addr_sub[address]
              del self.sub_addr[subscriber]
              subscriber.close()
              return True