refactor: remove unused subscription, add comments
refactor: remove unused subscription, add comments

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