Remove obsolute readme/changelog properties

app/models/package_version.py

 # Copyright (c) 2012, 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.
 
 import copy
 import json
 import tarfile
 
 from google.appengine.api import memcache
 from google.appengine.ext import db
@@ skipping 13 matching lines @@
     This model contains the actual (compressed) blob of code for this version of
     the package.
     """
 
     version = VersionProperty(required=True)
     """The version of the package."""
 
     pubspec = PubspecProperty(required=True, indexed=False)
     """The package version's pubspec file."""
 
-    readme = ReadmeProperty()
-    """The README file."""
-
     readmeFilename = db.StringProperty(indexed=False)
     """The README filename."""
 
     readmeContent = db.TextProperty()
     """The README file as a string."""
 
-    changelog = ReadmeProperty()
-    """The CHANGELOG file."""
 
     changelogFilename = db.StringProperty(indexed=False)
     """The CHANGELOG filename."""
 
     changelogContent = db.TextProperty()
     """The CHANGELOG file as a string."""
 
     libraries = db.ListProperty(str)
     """All libraries that can be imported from this package version."""
 
@@ skipping 261 matching lines @@
 
         if full:
             value.update({
                 'created': self.created.isoformat(),
                 'downloads': self.downloads,
                 'libraries': self.libraries,
                 'uploader': self.uploaderEmail
             })
 
         return value