code: function (socket) {
      if (this.listeners[socket.id]) {
        delete this.listeners[socket.id]
        if (Object.keys(this.listeners).length === 0) {
          this.destroy() // this will delete a liveQuery from liveQueries
        }
      } else {
        return new Error('no listener present on LQ ' + this.qKey)
      }
    }
docs: removes a socket listener from liveQuery and also destroys the whole liveQuery if no more listeners are present
  @param socket