Remove service-compiler related code.

pkg/servicec/lib/targets.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 servicec.targets;
-
-// Using pre-Dart 1.8 enums, to allow masking.
-class Target {
-  static const JAVA = const Target._(1);
-  static const CC   = const Target._(2);
-  // When editing: new targets should be a power of 2, and ALL should be the
-  // next power of 2 minus 1.
-  static const ALL  = const Target._(3);
-
-  static get values => [JAVA, CC, ALL];
-
-  final int value;
-
-  const Target._(this.value);
-
-  bool includes(Target t) {
-    return value & t.value > 0;
-  }
-}