Drop support for older Barback versions.

test/transformer/multiple_transformers_reject_their_config_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.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 pub_tests;
 
 import 'package:scheduled_test/scheduled_stream.dart';
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 const REJECT_CONFIG_TRANSFORMER = """
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 
 class RejectConfigTransformer extends Transformer {
   RejectConfigTransformer.asPlugin(BarbackSettings settings) {
     throw "I hate these settings!";
   }
 
   Future<bool> isPrimary(_) => new Future.value(true);
   Future apply(Transform transform) {}
 }
 """;
 
 main() {
-  withBarbackVersions("any", () {
-     integration("multiple transformers in the same phase reject their "
-         "configurations", () {
-       d.dir(appPath, [
-         d.pubspec({
-           "name": "myapp",
-           "transformers": [[
-             {"myapp/src/transformer": {'foo': 'bar'}},
-             {"myapp/src/transformer": {'baz': 'bang'}},
-             {"myapp/src/transformer": {'qux': 'fblthp'}}
-           ]]
-         }),
-         d.dir("lib", [d.dir("src", [
-           d.file("transformer.dart", REJECT_CONFIG_TRANSFORMER)
-         ])])
-       ]).create();
+    integration("multiple transformers in the same phase reject their "
+        "configurations", () {
+      d.dir(appPath, [
+        d.pubspec({
+          "name": "myapp",
+          "transformers": [[
+            {"myapp/src/transformer": {'foo': 'bar'}},
+            {"myapp/src/transformer": {'baz': 'bang'}},
+            {"myapp/src/transformer": {'qux': 'fblthp'}}
+          ]]
+        }),
+        d.dir("lib", [d.dir("src", [
+          d.file("transformer.dart", REJECT_CONFIG_TRANSFORMER)
+        ])])
+      ]).create();
 
-       createLockFile('myapp', pkg: ['barback']);
+      createLockFile('myapp', pkg: ['barback']);
 
-       // We should see three instances of the error message, once for each
-       // use of the transformer.
-       var pub = startPubServe();
-       for (var i = 0; i < 3; i++) {
-         pub.stderr.expect(consumeThrough(endsWith('Error loading transformer: '
-             'I hate these settings!')));
-       }
-       pub.shouldExit(1);
-     });
-  });
+      // We should see three instances of the error message, once for each
+      // use of the transformer.
+      var pub = startPubServe();
+      for (var i = 0; i < 3; i++) {
+        pub.stderr.expect(consumeThrough(endsWith('Error loading transformer: '
+            'I hate these settings!')));
+      }
+      pub.shouldExit(1);
+    });
 }