Drop support for older Barback versions.

test/transformer/fails_to_load_an_unconfigurable_transformer_when_config_is_passed_test.dart

Index: test/transformer/fails_to_load_an_unconfigurable_transformer_when_config_is_passed_test.dart
diff --git a/test/transformer/fails_to_load_an_unconfigurable_transformer_when_config_is_passed_test.dart b/test/transformer/fails_to_load_an_unconfigurable_transformer_when_config_is_passed_test.dart
index 2b4414827d40f530595538c8e6785e51e98d8c99..1c2c66ed700af1dc0cc60b1345b8664149a3661a 100644
--- a/test/transformer/fails_to_load_an_unconfigurable_transformer_when_config_is_passed_test.dart
+++ b/test/transformer/fails_to_load_an_unconfigurable_transformer_when_config_is_passed_test.dart
@@ -11,25 +11,23 @@ import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
-  withBarbackVersions("any", () {
-     integration("fails to load an unconfigurable transformer when config is "
-         "passed", () {
-       d.dir(appPath, [
-         d.pubspec({
-           "name": "myapp",
-           "transformers": [{"myapp/src/transformer": {'foo': 'bar'}}]
-         }),
-         d.dir("lib", [d.dir("src", [
-           d.file("transformer.dart", REWRITE_TRANSFORMER)
-         ])])
-       ]).create();
+   integration("fails to load an unconfigurable transformer when config is "
+       "passed", () {
+     d.dir(appPath, [
+       d.pubspec({
+         "name": "myapp",
+         "transformers": [{"myapp/src/transformer": {'foo': 'bar'}}]
+       }),
+       d.dir("lib", [d.dir("src", [
+         d.file("transformer.dart", REWRITE_TRANSFORMER)
+       ])])
+     ]).create();
 
-       createLockFile('myapp', pkg: ['barback']);
+     createLockFile('myapp', pkg: ['barback']);
 
-       var pub = startPubServe();
-       pub.stderr.expect(startsWith('No transformers that accept configuration '
-           'were defined in '));
-       pub.shouldExit(1);
-     });
-  });
+     var pub = startPubServe();
+     pub.stderr.expect(startsWith('No transformers that accept configuration '
+         'were defined in '));
+     pub.shouldExit(1);
+   });
 }