chore: remove obsolete files (#10240)

modules/@angular/core/src/di/decorators.dart

@@ -1,52 +0,0 @@
-library angular2.di.decorators;
-
-import 'metadata.dart';
-export 'metadata.dart';
-
-/**
- * {@link InjectMetadata}.
- * @stable
- */
-class Inject extends InjectMetadata {
-  const Inject(dynamic token) : super(token);
-}
-
-/**
- * {@link OptionalMetadata}.
- * @stable
- */
-class Optional extends OptionalMetadata {
-  const Optional() : super();
-}
-
-/**
- * {@link InjectableMetadata}.
- * @stable
- */
-class Injectable extends InjectableMetadata {
-  const Injectable() : super();
-}
-
-/**
- * {@link SelfMetadata}.
- * @stable
- */
-class Self extends SelfMetadata {
-  const Self() : super();
-}
-
-/**
- * {@link HostMetadata}.
- * @stable
- */
-class Host extends HostMetadata {
-  const Host() : super();
-}
-
-/**
- * {@link SkipSelfMetadata}.
- * @stable
- */
-class SkipSelf extends SkipSelfMetadata {
-  const SkipSelf() : super();
-}

modules/@angular/core/src/di/forward_ref.dart

@@ -1,15 +0,0 @@
-library angular2.di.forward_ref;
-
-typedef dynamic ForwardRefFn();
-
-/**
- * Dart does not have the forward ref problem, so this function is a noop.
- */
-forwardRef(ForwardRefFn forwardRefFn) => forwardRefFn();
-
-/**
- * Lazily retrieve the reference value.
- *
- * See: {@link forwardRef}
- */
-resolveForwardRef(type) => type;

modules/@angular/core/src/di/provider_util.dart

@@ -1,20 +0,0 @@
-import './provider.dart' show Provider;
-
-bool isProviderLiteral(dynamic obj) {
-  if (obj is Map) {
-    Map map = obj as Map;
-    return map.containsKey('provide');
-  } else {
-    return false;
-  }
-}
-
-Provider createProvider(dynamic obj) {
-  Map map = obj as Map;
-  return new Provider(map['provide'], useClass: map['useClass'],
-    useValue: map['useValue'],
-    useExisting: map['useExisting'],
-    useFactory: map['useFactory'],
-    deps: map['deps'],
-    multi: map['multi']);
-}