Remove service-compiler related code.

tools/servicec/lib/src/plugins/shared.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.
-
-library old_servicec.plugins.shared;
-
-import 'package:servicec/util.dart' as strings;
-
-import '../parser.dart';
-export '../parser.dart';
-
-abstract class CodeGenerationVisitor extends Visitor {
-  final String path;
-  final StringBuffer buffer = new StringBuffer();
-  CodeGenerationVisitor(this.path);
-
-  void write(String s) => buffer.write(s);
-  void writeln([String s = '']) => buffer.writeln(s);
-
-  String camelize(String name) {
-    return strings.camelize(strings.underscore(name));
-  }
-
-  visit(Node node) => node.accept(this);
-
-  visitStruct(Struct node) {
-    // TODO(kasper): Stop ignoring this.
-  }
-
-  visitUnion(Union node) {
-    // TODO(kasper): Stop ignoring this.
-  }
-
-  visitNodes(List<Node> nodes, String separatedBy(bool first)) {
-    bool first = true;
-    for (int i = 0; i < nodes.length; i++) {
-      write(separatedBy(first));
-      if (first) first = false;
-      visit(nodes[i]);
-    }
-  }
-}