Revert "export stream ops"

This reverts commit b3ba781.

Author: jcouyang

src/index.ts

@@ -3,4 +3,3 @@ export * from './interfaces'
 export * from './xclass'
 export * from './fantasy'
 export * from './forms'
-export * from './xs'

src/xs/rx.ts

@@ -1,14 +1,14 @@
 import { Observable } from '@reactivex/rxjs/dist/cjs/Observable'
 import { Subject } from '@reactivex/rxjs/dist/cjs/Subject'
-import { Subscription, StreamOps } from '..'
+import { Subscription, StreamOps } from './index'
 import '@reactivex/rxjs/dist/cjs/add/operator/map'
 import '@reactivex/rxjs/dist/cjs/add/operator/merge'
 import '@reactivex/rxjs/dist/cjs/add/operator/catch'
 import '@reactivex/rxjs/dist/cjs/add/operator/filter'
 import '@reactivex/rxjs/dist/cjs/add/observable/empty'
 import '@reactivex/rxjs/dist/cjs/add/observable/combineLatest'
 
-declare module '..' {
+declare module './index' {
   interface HKT<A> {
     Observable: Observable<A>
   }