docs: public void removePoller(PollItem pollItem)
      {
          Iterator<SPoller> it = pollers.iterator();
          while (it.hasNext()) {
              SPoller p = it.next();
              if (pollItem.equals(p.item)) {
                  it.remove();
                  dirty = true;
              }
          }
          if (verbose) {
              System.out.printf(
                                "I: zloop: cancel %s poller (%s, %s)",
                                pollItem.getSocket() != null ? pollItem.getSocket().getType() : "RAW",
                                        pollItem.getSocket(),
                                        pollItem.getRawSocket());
          }
  
      }