Revert of mojo: Starting serialization for python bindings.

mojo/public/tools/bindings/generators/python_templates/module.py.tmpl

 {% from "module_macros.tmpl" import enum_values %}
 # 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.
 
 import mojo.bindings.descriptor as _descriptor
 import mojo.bindings.reflection as _reflection
 {% if imports %}
 
 {% for import in imports %}
@@ skipping 28 matching lines @@
 {%   if struct.enums %}
     'enums': {
 {%     for enum in struct.enums %}
       '{{enum|name}}': {{enum_values(enum)|indent(6)}},
 {%     endfor %}
     },
 {%   endif %}
 {%   if struct.fields %}
     'fields': [
 {%    for byte in struct.bytes %}
-{%      if byte.packed_fields %}
-      {{byte|field_group}},
-{%      endif %}
+{%     for packed_field in byte.packed_fields %}
+      {{packed_field|field_descriptor}},
+{%     endfor %}
 {%   endfor %}
     ],
 {%   endif %}
   }
 {% endfor %}