message: docs(manual): remove unused variable from code example
diff: @@ -156,7 +156,7 @@ Below is an example:
  var source = Rx.Observable.interval(500);
  var subject = new Rx.Subject();
  var refCounted = source.multicast(subject).refCount();
  -var subscription1, subscription2, subscriptionConnect;
  +var subscription1, subscription2;
  // This calls `connect()`, because
  // it is the first subscriber to `refCounted`
  