Drop support for older Barback versions.

test/transformer/runs_a_local_transform_on_the_application_package_test.dart

Index: test/transformer/runs_a_local_transform_on_the_application_package_test.dart
diff --git a/test/transformer/runs_a_local_transform_on_the_application_package_test.dart b/test/transformer/runs_a_local_transform_on_the_application_package_test.dart
index bef76e3ab704bae7afbcad2aa05f60c345401035..7a13867429dc2dd8063b84dc5cb30544842e5559 100644
--- a/test/transformer/runs_a_local_transform_on_the_application_package_test.dart
+++ b/test/transformer/runs_a_local_transform_on_the_application_package_test.dart
@@ -9,26 +9,24 @@ import '../test_pub.dart';
 import '../serve/utils.dart';
 
 main() {
-  withBarbackVersions("any", () {
-    integration("runs a local transform on the application package", () {
-      d.dir(appPath, [
-        d.pubspec({
-          "name": "myapp",
-          "transformers": ["myapp/src/transformer"]
-        }),
-        d.dir("lib", [d.dir("src", [
-          d.file("transformer.dart", REWRITE_TRANSFORMER)
-        ])]),
-        d.dir("web", [
-          d.file("foo.txt", "foo")
-        ])
-      ]).create();
+  integration("runs a local transform on the application package", () {
+    d.dir(appPath, [
+      d.pubspec({
+        "name": "myapp",
+        "transformers": ["myapp/src/transformer"]
+      }),
+      d.dir("lib", [d.dir("src", [
+        d.file("transformer.dart", REWRITE_TRANSFORMER)
+      ])]),
+      d.dir("web", [
+        d.file("foo.txt", "foo")
+      ])
+    ]).create();
 
-      createLockFile('myapp', pkg: ['barback']);
+    createLockFile('myapp', pkg: ['barback']);
 
-      pubServe();
-      requestShouldSucceed("foo.out", "foo.out");
-      endPubServe();
-    });
+    pubServe();
+    requestShouldSucceed("foo.out", "foo.out");
+    endPubServe();
   });
 }