message: refactor(timeout): remove unnecessary subscriber.add()
diff: @@ -357,11 +357,10 @@ export function timeout<T, R, M>(config: number | Date | TimeoutConfig<T, R, M>,
  );
  };
  - subscriber.add(
  - (originalSourceSubscription = source.subscribe(
  + originalSourceSubscription = source.subscribe(
  new OperatorSubscriber(
  subscriber,
  - (value) => {
  + (value: T) => {
  // clear the timer so we can emit and start another one.
  timerSubscription?.unsubscribe();
  seen++;
  @@ -381,7 +380,6 @@ export function timeout<T, R, M>(config: number | Date | TimeoutConfig<T, R, M>,
  lastValue = null;
  }
  )
  - ))
  );
  // Intentionally terse code.
  