Revert "Build Observatory with runtime"

runtime/observatory/test/inbound_references_test.dart

-// 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 inbound_references_test;
-
-import 'dart:async';
-import 'package:observatory/service_io.dart';
-import 'package:unittest/unittest.dart';
-import 'test_helper.dart';
-
-class Node {
-  var edge;
-}
-
-class Edge { }
-
-var n, e, array;
-
-void script() {
-  n = new Node();
-  e = new Edge();
-  n.edge = e;
-  array = new List(2);
-  array[0] = n;
-  array[1] = e;
-}
-
-var tests = [
-
-(Isolate isolate) =>
-  isolate.rootLib.load().then((Library lib) {
-    Instance e = lib.variables.where((v) => v.name == 'e').single.value;
-    var id = e.id;
-    return isolate.get('/$id/inbound_references?limit=100').then(
-        (ServiceMap response) {
-          List references = response['references'];
-          hasReferenceSuchThat(predicate) {
-            expect(references.any(predicate), isTrue);
-          }
-
-          // Assert e is referenced by at least n, array, and the top-level
-          // field e.
-          hasReferenceSuchThat((r) => r['slot'] is Field &&
-                                      r['slot'].name=='edge' &&
-                                      r['source'].isInstance &&
-                                      r['source'].clazz.name=='Node');
-          hasReferenceSuchThat((r) => r['slot'] == 1 &&
-                                      r['source'].isList);
-          hasReferenceSuchThat((r) => r['slot']=='<unknown>' &&
-                                      r['source'] is Field);
-    });
-}),
-
-];
-
-main(args) => runIsolateTests(args, tests, testeeBefore: script);