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

sdk/lib/_internal/pub_generated/test/lish/force_publishes_if_there_are_warnings_test.dart

Index: sdk/lib/_internal/pub_generated/test/lish/force_publishes_if_there_are_warnings_test.dart
diff --git a/sdk/lib/_internal/pub/test/lish/force_publishes_if_there_are_warnings_test.dart b/sdk/lib/_internal/pub_generated/test/lish/force_publishes_if_there_are_warnings_test.dart
similarity index 83%
copy from sdk/lib/_internal/pub/test/lish/force_publishes_if_there_are_warnings_test.dart
copy to sdk/lib/_internal/pub_generated/test/lish/force_publishes_if_there_are_warnings_test.dart
index 092855d0039f29019741e74d0d1cae16061d6dbc..faf58fec47ddee99b19cfda084800f9d339b696c 100644
--- a/sdk/lib/_internal/pub/test/lish/force_publishes_if_there_are_warnings_test.dart
+++ b/sdk/lib/_internal/pub_generated/test/lish/force_publishes_if_there_are_warnings_test.dart
@@ -32,16 +32,18 @@ main() {
 
     server.handle('GET', '/create', (request) {
       return new shelf.Response.ok(JSON.encode({
-        'success': {'message': 'Package test_pkg 1.0.0 uploaded!'}
+        'success': {
+          'message': 'Package test_pkg 1.0.0 uploaded!'
+        }
       }));
     });
 
     pub.shouldExit(exit_codes.SUCCESS);
     pub.stderr.expect(consumeThrough('Suggestions:'));
-    pub.stderr.expect(emitsLines(
-        '* Author "Natalie Weizenbaum" in pubspec.yaml should have an email '
-            'address\n'
-        '  (e.g. "name <email>").'));
+    pub.stderr.expect(
+        emitsLines(
+            '* Author "Natalie Weizenbaum" in pubspec.yaml should have an email '
+                'address\n' '  (e.g. "name <email>").'));
     pub.stdout.expect(consumeThrough('Package test_pkg 1.0.0 uploaded!'));
   });
 }