feat(observable): removed deprecated `` operator

BREAKING CHANGE: The `pairs` function is no longer available. Use `from(Object.entries(obj))` instead `pairs(obj)`.

Author: demensky

docs_app/src/assets/images/marble-diagrams/pairs.png

@@ -65,7 +65,6 @@ describe('index', () => {
     expect(index.merge).to.exist;
     expect(index.of).to.exist;
     expect(index.onErrorResumeNext).to.exist;
-    expect(index.pairs).to.exist;
     expect(index.race).to.exist;
     expect(index.range).to.exist;
     expect(index.throwError).to.exist;

spec-dtslint/operators/pairs-spec.ts

@@ -73,7 +73,6 @@ export { interval } from './internal/observable/interval';
 export { merge } from './internal/observable/merge';
 export { of } from './internal/observable/of';
 export { onErrorResumeNext } from './internal/observable/onErrorResumeNext';
-export { pairs } from './internal/observable/pairs';
 export { partition } from './internal/observable/partition';
 export { race } from './internal/observable/race';
 export { range } from './internal/observable/range';