Revert "Build Observatory with runtime"

runtime/observatory/lib/service.dart

Index: runtime/observatory/lib/service.dart
diff --git a/runtime/observatory/lib/service.dart b/runtime/observatory/lib/service.dart
deleted file mode 100644
index 9b66b2e6662aa17070bcd93f9689f6c1391c0e46..0000000000000000000000000000000000000000
--- a/runtime/observatory/lib/service.dart
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright (c) 2014, the Dart 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 service;
-
-import 'dart:async';
-import 'dart:convert';
-import 'dart:typed_data';
-
-import 'package:logging/logging.dart';
-import 'package:observatory/tracer.dart';
-import 'package:observe/observe.dart';
-
-part 'src/service/object.dart';