refactor(testing): remove deprecated testing functions (#10832)

Remove TestComponentBuilder, addProviders, and withProviders. These
were deprecated in rc5 - see the changelog for update information.

Note - this does not actually remove the functions, but makes them
internal only. They will be removed from the codebase entirely
at a later time.

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

@@ -429,13 +429,6 @@ export class InjectSetupWrapper {
   }
 }
 
-/**
- * @deprecated Use `TestBed.configureTestingModule instead.
- */
-export function withProviders(providers: () => any) {
-  return new InjectSetupWrapper(() => { return {providers: providers()}; });
-}
-
 /**
  * @experimental
  */

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

@@ -27,13 +27,6 @@ if (_global.beforeEach) {
   });
 }
 
-/**
- * Allows overriding default providers of the test injector,
- * which are defined in test_injector.js
- *
- * @deprecated Use `TestBed.configureTestingModule instead.
- */
-export function addProviders(providers: Array<any>): void {
-  if (!providers) return;
-  TestBed.configureTestingModule({providers: providers});
-}
+// TODO(juliemr): remove this, only used because we need to export something to have compilation
+// work.
+export var __core_private_testing_placeholder__ = '';

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

@@ -10,7 +10,7 @@ import {StringMapWrapper} from '../src/facade/collection';
 import {Math, global, isFunction, isPromise} from '../src/facade/lang';
 
 import {AsyncTestCompleter} from './async_test_completer';
-import {getTestBed, inject} from './test_bed';
+import {TestBed, getTestBed, inject} from './test_bed';
 
 export {AsyncTestCompleter} from './async_test_completer';
 export {MockAnimationPlayer} from './mock_animation_player';
@@ -18,6 +18,7 @@ export {inject} from './test_bed';
 export * from './logger';
 export * from './ng_zone_mock';
 export * from './mock_application_ref';
+export * from './test_component_builder';
 
 export var proxy: ClassDecorator = (t: any /** TODO #9100 */) => t;
 
@@ -113,6 +114,18 @@ export function beforeEachProviders(fn: any /** TODO #9100 */): void {
   });
 }
 
+/**
+ * Allows overriding default providers of the test injector,
+ * which are defined in test_injector.js
+ *
+ * @deprecated Use `TestBed.configureTestingModule instead.
+ */
+export function addProviders(providers: Array<any>): void {
+  if (!providers) return;
+  TestBed.configureTestingModule({providers: providers});
+}
+
+
 /**
  * @deprecated
  */