docs(manual): remove unused variable from code example (#3367)
docs(manual): remove unused variable from code example (#3367)


ReactiveX/RxJS,Brocco/RxJS,jayphelps/rxjs,martinsik/rxjs,ReactiveX/RxJS,kwonoj/RxJS,kwonoj/RxJS,ReactiveX/rxjs,Brocco/RxJS,trxcllnt/RxJS,martinsik/rxjs,kwonoj/RxJS,ReactiveX/RxJS,jayphelps/rxjs,ReactiveX/rxjs,ReactiveX/rxjs,trxcllnt/RxJS,benlesh/RxJS,jayphelps/rxjs,ReactiveX/RxJS,benlesh/RxJS,IgorMinar/RxJS,benlesh/RxJS,Brocco/RxJS,trxcllnt/RxJS,ReactiveX/rxjs,Brocco/RxJS,IgorMinar/RxJS,trxcllnt/RxJS,jayphelps/rxjs,martinsik/rxjs,martinsik/rxjs,benlesh/RxJS,kwonoj/RxJS,jayphelps/rxjs