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

sdk/lib/_internal/pub_generated/test/get/hosted/cached_pubspec_test.dart

Index: sdk/lib/_internal/pub_generated/test/get/hosted/cached_pubspec_test.dart
diff --git a/sdk/lib/_internal/pub/test/get/hosted/cached_pubspec_test.dart b/sdk/lib/_internal/pub_generated/test/get/hosted/cached_pubspec_test.dart
similarity index 85%
copy from sdk/lib/_internal/pub/test/get/hosted/cached_pubspec_test.dart
copy to sdk/lib/_internal/pub_generated/test/get/hosted/cached_pubspec_test.dart
index 77a3a3f4fe8da8be5723b239928eea35ae75af48..750ef6df2ab4edab63d6066f650f0a9ab0c86e55 100644
--- a/sdk/lib/_internal/pub/test/get/hosted/cached_pubspec_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/get/hosted/cached_pubspec_test.dart
@@ -15,7 +15,9 @@ main() {
   integration('does not request a pubspec for a cached package', () {
     servePackages((builder) => builder.serve("foo", "1.2.3"));
 
-    d.appDir({"foo": "1.2.3"}).create();
+    d.appDir({
+      "foo": "1.2.3"
+    }).create();
 
     // Get once so it gets cached.
     pubGet();
@@ -24,8 +26,12 @@ main() {
     // the initial get.
     getRequestedPaths();
 
-    d.cacheDir({"foo": "1.2.3"}).validate();
-    d.packagesDir({"foo": "1.2.3"}).validate();
+    d.cacheDir({
+      "foo": "1.2.3"
+    }).validate();
+    d.packagesDir({
+      "foo": "1.2.3"
+    }).validate();
 
     // Run the solver again now that it's cached.
     pubGet();