Revert "Use native async/await support in pub."

sdk/lib/_internal/pub_generated/test/run/displays_transformer_logs_test.dart

Index: sdk/lib/_internal/pub_generated/test/run/displays_transformer_logs_test.dart
diff --git a/sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart b/sdk/lib/_internal/pub_generated/test/run/displays_transformer_logs_test.dart
similarity index 88%
copy from sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart
copy to sdk/lib/_internal/pub_generated/test/run/displays_transformer_logs_test.dart
index 16141750333d3d0ad10cc702beca63aef250b36b..05af33026152e14cca2509da17f062e9fc68f398 100644
--- a/sdk/lib/_internal/pub/test/run/displays_transformer_logs_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/run/displays_transformer_logs_test.dart
@@ -48,21 +48,16 @@ main() {
   initConfig();
   withBarbackVersions("any", () {
     integration('displays transformer log messages', () {
-      d.dir(appPath, [
-        d.pubspec({
+      d.dir(appPath, [d.pubspec({
           "name": "myapp",
           "transformers": ["myapp/src/transformer"]
         }),
-        d.dir("lib", [
-          d.file("lib.dart", LIB),
-          d.dir("src", [
-            d.file("transformer.dart", TRANSFORMER)
-          ])
-        ]),
-        d.dir("bin", [
-          d.file("script.dart", SCRIPT)
-        ])
-      ]).create();
+            d.dir(
+                "lib",
+                [
+                    d.file("lib.dart", LIB),
+                    d.dir("src", [d.file("transformer.dart", TRANSFORMER)])]),
+            d.dir("bin", [d.file("script.dart", SCRIPT)])]).create();
 
       createLockFile('myapp', pkg: ['barback']);