dart2js: remove obsolete code in the old emitter.

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

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart2js.js_emitter;
 
 // TODO(ahe): Share these with js_helper.dart.
 const FUNCTION_INDEX = 0;
 const NAME_INDEX = 1;
 const CALL_NAME_INDEX = 2;
@@ skipping 434 matching lines @@
        new Function("\$collectedClasses", 
            processedClasses.combinedConstructorFunction)
                (processedClasses.collected);
       processedClasses.combinedConstructorFunction = null;
     }
 
     for (var i = 0; i < constructors.length; i++) {
       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;
       globalObject[cls] = constructor;
     }
     constructors = null;
 
     #finishClassFunction;
 
     #trivialNsmHandlers;
@@ skipping 75 matching lines @@
 (function() {
   var result = $array[$index];
   if ($check) {
     throw new Error(
         name + ": expected value of type \'$type\' at index " + ($index) +
         " but got " + (typeof result));
   }
   return result;
 })()''';
 }