refactor(throttleTime): small clean up
refactor(throttleTime): small clean up

ReactiveX/RxJS,martinsik/rxjs,martinsik/rxjs,martinsik/rxjs,benlesh/RxJS,martinsik/rxjs,benlesh/RxJS,ReactiveX/RxJS,ReactiveX/rxjs,ReactiveX/rxjs,ReactiveX/rxjs,ReactiveX/RxJS,ReactiveX/rxjs,benlesh/RxJS,ReactiveX/RxJS,benlesh/RxJS