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

sdk/lib/_internal/pub_generated/test/validator/license_test.dart

Index: sdk/lib/_internal/pub_generated/test/validator/license_test.dart
diff --git a/sdk/lib/_internal/pub/test/validator/license_test.dart b/sdk/lib/_internal/pub_generated/test/validator/license_test.dart
similarity index 95%
copy from sdk/lib/_internal/pub/test/validator/license_test.dart
copy to sdk/lib/_internal/pub_generated/test/validator/license_test.dart
index 5c3a06bafbaf0b53962dd61fae14e34819642e52..7cd2039481a6fce11559e6f3850d7f6efffb3000 100644
--- a/sdk/lib/_internal/pub/test/validator/license_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/validator/license_test.dart
@@ -42,7 +42,8 @@ main() {
     });
   });
 
-  integration('should consider a package invalid if it has no LICENSE file',
+  integration(
+      'should consider a package invalid if it has no LICENSE file',
       () {
     d.validPackage.create();
     schedule(() => deleteEntry(path.join(sandboxDir, appPath, 'LICENSE')));