Remove service-compiler related code.

tools/servicec/lib/src/emitter.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.emitter;
-
-import 'dart:io';
-
-import 'package:path/path.dart' show basenameWithoutExtension, join;
-
-void writeToFile(String outputDirectory,
-                 String path,
-                 String contents,
-                 {String extension}) {
-  // Create output directory if it doesn't already exist.
-  new Directory(outputDirectory).createSync(recursive: true);
-  // Write contents of the file.
-  String fileName = path;
-  if (extension != null) {
-    String base = basenameWithoutExtension(path);
-    fileName = '$base.$extension';
-  }
-  String filePath = join(outputDirectory, fileName);
-  new File(filePath).writeAsStringSync(contents);
-}
-