Remove service-compiler related code.

pkg/servicec/lib/marker.dart

-// Copyright (c) 2015, the Dartino project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'node.dart' show
-    Node,
-    NodeVisitor;
-
-import 'errors.dart' show
-    InternalCompilerError;
-
-import 'package:compiler/src/tokens/token.dart' show
-    Token;
-
-// Marker nodes.
-abstract class MarkerNode extends Node {
-  Token token;
-
-  MarkerNode(this.token);
-
-  void accept(NodeVisitor visitor) {
-    throw new InternalCompilerError("MarkerNode visited");
-  }
-}
-
-class BeginFunctionMarker extends MarkerNode {
-  BeginFunctionMarker(Token token)
-    : super(token);
-}
-
-class BeginFieldMarker extends MarkerNode {
-  BeginFieldMarker(Token token)
-    : super(token);
-}
-
-class BeginFormalMarker extends MarkerNode {
-  BeginFormalMarker(Token token)
-    : super(token);
-}
-
-class BeginServiceMarker extends MarkerNode {
-  BeginServiceMarker(Token token)
-    : super(token);
-}
-
-class BeginStructMarker extends MarkerNode {
-  BeginStructMarker(Token token)
-    : super(token);
-}
-
-class BeginTypeMarker extends MarkerNode {
-  BeginTypeMarker(Token token)
-    : super(token);
-}
-
-class BeginUnionMarker extends MarkerNode {
-  BeginUnionMarker(Token token)
-    : super(token);
-}