message: refactor(throttle): a bit smaller
diff: @@ -80,16 +80,10 @@ export function throttle<T>(
  trailing && send();
  };
  - const throttle = (value: T) => {
  - let result: Observable<any>;
  - try {
  - result = from(durationSelector(value));
  - } catch (err) {
  - subscriber.error(err);
  - return;
  - }
  - subscriber.add((throttled = result.subscribe(new OperatorSubscriber(subscriber, throttlingDone, undefined, throttlingDone))));
  - };
  + const throttle = (value: T) =>
  + (throttled = from(durationSelector(value)).subscribe(
  + new OperatorSubscriber(subscriber, throttlingDone, undefined, throttlingDone)
  + ));
  const send = () => {
  if (hasValue) {
  