Add tests for BuildGroup names

tools/gardening/lib/src/buildbot_loading.dart

Index: tools/gardening/lib/src/buildbot_loading.dart
diff --git a/tools/gardening/lib/src/buildbot_loading.dart b/tools/gardening/lib/src/buildbot_loading.dart
index b7f478cdc330281fc5492a5d1a54ace4e508ce23..ee4ce292aaeecd1db341778be6a256dab9a52bd5 100644
--- a/tools/gardening/lib/src/buildbot_loading.dart
+++ b/tools/gardening/lib/src/buildbot_loading.dart
@@ -33,11 +33,11 @@ Future<BuildResult> _readBuildResult(
 
 /// Fetches test data for [buildUri] through the buildbot stdio.
 Future<BuildResult> readBuildResultFromHttp(
-    HttpClient client, BuildUri buildUri) async {
+    HttpClient client, BuildUri buildUri) {
   Future<String> read() async {
     Uri uri = buildUri.toUri();
     log('Reading buildbot results: $uri');
-    return await readUriAsText(client, uri);
+    return readUriAsText(client, uri);
   }
 
   return _readBuildResult(buildUri, read);