Removing the mutation in the factories for getting dep repositories

appengine/findit/libs/gitiles/gitiles_repository.py

 # 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 base64
 from datetime import datetime
 from datetime import timedelta
 import json
 import re
 
@@ skipping 25 matching lines @@
       self._repo_url = repo_url[:-1]
     else:
       self._repo_url = repo_url
 
     self._http_client = http_client
 
   @property
   def repo_url(self):
     return self._repo_url
 
-  @repo_url.setter
-  def repo_url(self, repo_url):
-    self._repo_url = repo_url
-
   @property
   def http_client(self):
     return self._http_client
 
-  @property
-  def identifier(self):
-    return self.repo_url
-
   def _SendRequestForJsonResponse(self, url, params=None):
     if params is None:  # pragma: no cover
       params = {}
     params['format'] = 'json'
 
     # Gerrit prepends )]}' to json-formatted response.
     prefix = ')]}\'\n'
 
     status_code, content = self.http_client.Get(url, params)
     if status_code != 200:
@@ skipping 144 matching lines @@
 
       for log in data['log']:
         changelogs.append(self._ParseChangeLogFromLogData(log))
 
       if 'next' in data:
         next_end_revision = data['next']
       else:
         next_end_revision = None
 
     return changelogs