refactor(Provider): remove deprecated provider/bind API (#10652)

Closes #9751

BREAKING CHANGE:

These forms of providers are no longer accepted:
  bind(MyClass).toFactory(...)
  new Provider(MyClass, toFactory: ...)

We now only accept:
  {provider: MyClass, toFactory: ...}

modules/@angular/core/testing/testing_internal.ts

@@ -6,7 +6,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {provide} from '../index';
 import {StringMapWrapper} from '../src/facade/collection';
 import {Math, global, isFunction, isPromise} from '../src/facade/lang';