refactor(forms): remove FORM_PROVIDERS, FORM_DIRECTIVES, REACTIVE_FORM_PROVIDERS, REACTIVE_DIRECTIVES

All of these have been replaced by FormsModule and ReactiveFormsModule.

modules/@angular/forms/src/directives/form_interface.ts

@@ -18,7 +18,7 @@ import {NgControl} from './ng_control';
  *
  * Only used by the forms module.
  *
- * @experimental
+ * @stable
  */
 export interface Form {
   /**

modules/@angular/forms/src/form_providers.ts

@@ -6,33 +6,20 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {NgModule, Type} from '@angular/core';
+import {NgModule} from '@angular/core';
 
 import {InternalFormsSharedModule, REACTIVE_DRIVEN_DIRECTIVES, TEMPLATE_DRIVEN_DIRECTIVES} from './directives';
 import {RadioControlRegistry} from './directives/radio_control_value_accessor';
 import {FormBuilder} from './form_builder';
 
 
-
-/**
- * Shorthand set of providers used for building Angular forms.
- * @stable
- */
-export const FORM_PROVIDERS: Type<any>[] = [RadioControlRegistry];
-
-/**
- * Shorthand set of providers used for building reactive Angular forms.
- * @stable
- */
-export const REACTIVE_FORM_PROVIDERS: Type<any>[] = [FormBuilder, RadioControlRegistry];
-
 /**
  * The ng module for forms.
  * @stable
  */
 @NgModule({
   declarations: TEMPLATE_DRIVEN_DIRECTIVES,
-  providers: [FORM_PROVIDERS],
+  providers: [RadioControlRegistry],
   exports: [InternalFormsSharedModule, TEMPLATE_DRIVEN_DIRECTIVES]
 })
 export class FormsModule {
@@ -44,7 +31,7 @@ export class FormsModule {
  */
 @NgModule({
   declarations: [REACTIVE_DRIVEN_DIRECTIVES],
-  providers: [REACTIVE_FORM_PROVIDERS],
+  providers: [FormBuilder, RadioControlRegistry],
   exports: [InternalFormsSharedModule, REACTIVE_DRIVEN_DIRECTIVES]
 })
 export class ReactiveFormsModule {

modules/@angular/forms/src/forms.ts

@@ -21,7 +21,6 @@
  */
 
 
-export {FORM_DIRECTIVES, REACTIVE_FORM_DIRECTIVES} from './directives';
 export {AbstractControlDirective} from './directives/abstract_control_directive';
 export {AbstractFormGroupDirective} from './directives/abstract_form_group_directive';
 export {CheckboxControlValueAccessor} from './directives/checkbox_value_accessor';