code: function (req)
      {
          Strophe.debug("removing request");
  
          var i;
          for (i = this._requests.length - 1; i >= 0; i--) {
              if (req == this._requests[i]) {
                  this._requests.splice(i, 1);
              }
          }
  
          // IE6 fails on setting to null, so set to empty function
          req.xhr.onreadystatechange = function () {};
  
          this._throttledRequestHandler();
      }
docs: PrivateFunction: _removeRequest
  _Private_ function to remove a request from the queue.
  
  Parameters:
  (Strophe.Request) req - The request to remove.