"Reverting 25160"

pkg/docgen/test/single_library_test.dart

Index: pkg/docgen/test/single_library_test.dart
diff --git a/pkg/docgen/test/single_library_test.dart b/pkg/docgen/test/single_library_test.dart
index 6ff153985dd11b6f93fecf6594a9c88860c435a1..f00ddc4d2f40f6fd14723f493208212aae702fa4 100644
--- a/pkg/docgen/test/single_library_test.dart
+++ b/pkg/docgen/test/single_library_test.dart
@@ -54,11 +54,7 @@ main() {
               includePrivate: true);
           expect(library is Library, isTrue);
           
-          var classTypes = library.classes.values;
-          expect(classTypes.every((e) => e is Map), isTrue);
-          
-          var classes = [];
-          classTypes.forEach((e) => classes.addAll(e.values));
+          var classes = library.classes.values;
           expect(classes.every((e) => e is Class), isTrue);
           
           var classMethodTypes = [];