Cleanup mojo-js tests.

mojo/public/js/tests/codec_unittest.js

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 define([
     "gin/test/expect",
     "mojo/public/js/codec",
     "mojo/public/interfaces/bindings/tests/rect.mojom",
     "mojo/public/interfaces/bindings/tests/sample_service.mojom",
     "mojo/public/interfaces/bindings/tests/test_structs.mojom",
@@ skipping 294 matching lines @@
         }).toThrow();
       });
 
       validExamples.forEach(function(valid) {
         var encoder = new codec.MessageBuilder(42, 24).createEncoder(8);
         method.apply(encoder, baseArgs.concat(valid));
       });
     });
   }
 });