chore(package.json): Remove JSPM override
chore(package.json): Remove JSPM override

Now NPM distribution + versioning are up and running, this is unnecessary.

SangKa/RxJS-Docs-CN,elliotschi/rxjs,gluck/RxJS,trxcllnt/RxJS,figueredo/RxJS,ReactiveX/RxJS,ReactiveX/rxjs,IgorMinar/RxJS,robwormald/RxJS,robwormald/RxJS,mattpodwysocki/RxJS,benlesh/RxJS,jayphelps/rxjs,jadbox/RxJS,mattpodwysocki/RxJS,adrianomelo/RxJS-1,gluck/RxJS,adrianomelo/RxJS-1,jayphelps/rxjs,adrianomelo/RxJSNext,kwonoj/RxJS,trxcllnt/RxJS,figueredo/RxJS,RxJS-CN/RxJS-Docs-CN,Brocco/RxJS,Igorbek/rxjs5,justinwoo/RxJS,ReactiveX/RxJS,adrianomelo/RxJS-1,staltz/RxJSNext,justinwoo/RxJS,SangKa/RxJS-Docs-CN,staltz/RxJSNext,IgorMinar/RxJS,jadbox/RxJS,jinroh/RxJS,gluck/RxJS,Igorbek/rxjs5,SangKa/RxJS-Docs-CN,RxJS-CN/RxJS-Docs-CN,justinwoo/RxJS,benlesh/RxJS,figueredo/RxJS,jayphelps/rxjs,kwonoj/RxJS,benlesh/RxJS,figueredo/RxJS,jadbox/RxJS,Brocco/RxJS,saneyuki/RxJS,elliotschi/rxjs,saneyuki/RxJS,adrianomelo/RxJSNext,ReactiveX/rxjs,trxcllnt/RxJS,Igorbek/rxjs5,adrianomelo/RxJSNext,RxJS-CN/RxJS-Docs-CN,martinsik/rxjs,Igorbek/rxjs5,elliotschi/rxjs,SangKa/RxJS-Docs-CN,jadbox/RxJS,martinsik/rxjs,jayphelps/rxjs,Brocco/RxJS,staltz/RxJSNext,benlesh/RxJS,ReactiveX/rxjs,adrianomelo/RxJS-1,kwonoj/RxJS,kwonoj/RxJS,martinsik/rxjs,RxJS-CN/RxJS-Docs-CN,martinsik/rxjs,robwormald/RxJS,elliotschi/rxjs,jayphelps/rxjs,ReactiveX/RxJS,Brocco/RxJS,jinroh/RxJS,gluck/RxJS,trxcllnt/RxJS,ReactiveX/RxJS,jinroh/RxJS,jinroh/RxJS,ReactiveX/rxjs,robwormald/RxJS,adrianomelo/RxJSNext,mattpodwysocki/RxJS,staltz/RxJSNext,justinwoo/RxJS,mattpodwysocki/RxJS