dart2js: remove obsolete code in the old emitter.

pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart

Index: pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
diff --git a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
index 0f0036d41dc9e21755845a7abf54b864e50acf5d..212873b1eceeb5a0b6fb1b4c4db7dd036997f54d 100644
--- a/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
+++ b/pkg/compiler/lib/src/js_emitter/old_emitter/reflection_data_parser.dart
@@ -452,11 +452,8 @@ jsAst.Statement getReflectionDataParser(OldEmitter oldEmitter,
       var constructor = constructors[i];
       var cls = constructor.name;
       var desc = processedClasses.collected[cls];
-      var globalObject = \$;
-      if (desc instanceof Array) {
-        globalObject = desc[0] || \$;
-        desc = desc[1];
-      }
+      var globalObject = desc[0];
+      desc = desc[1];
       if (#isTreeShakingDisabled)
         constructor["${namer.metadataField}"] = desc;
       allClasses[cls] = constructor;