code: func (cm *ConnManager) Remove(id uint64) {
  	if atomic.LoadInt32(&cm.stop) != 0 {
  		return
  	}
  
  	select {
  	case cm.requests <- handleDisconnected{id, false}:
  	case <-cm.quit:
  	}
  }
docs: // Remove removes the connection corresponding to the given connection id from
  // known connections.
  //
  // NOTE: This method can also be used to cancel a lingering connection attempt
  // that hasn't yet succeeded.