Reland "Delete lots of svn logic from bot_update"

tests/bot_update_coverage_test.py

 #!/usr/bin/env python
 # Copyright (c) 2015 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 codecs
 import copy
 import json
 import os
 import sys
@@ skipping 19 matching lines @@
     'patch_root': None,
     'issue': None,
     'patchset': None,
     'rietveld_server': None,
     'gerrit_repo': None,
     'gerrit_ref': None,
     'gerrit_rebase_patch_ref': None,
     'revision_mapping': {},
     'apply_issue_email_file': None,
     'apply_issue_key_file': None,
-    'buildspec': False,
     'gyp_env': None,
     'shallow': False,
     'runhooks': False,
     'refs': [],
     'git_cache_dir': '',
     'gerrit_reset': None,
 }
 
 
 class MockedPopen(object):
@@ skipping 134 matching lines @@
   def tearDown(self):
     setattr(bot_update, 'call', self.old_call)
     setattr(os, 'getcwd', self.old_os_cwd)
     delattr(bot_update, 'open')
     setattr(codecs, 'open', self.old_codecs_open)
 
   def testBasic(self):
     bot_update.ensure_checkout(**self.params)
     return self.call.records
 
-  def testBasicBuildspec(self):
-    self.params['buildspec'] = bot_update.BUILDSPEC_TYPE(
-        container='branches',
-        version='1.1.1.1'
-    )
-    bot_update.ensure_checkout(**self.params)
-    return self.call.records
-
   def testBasicShallow(self):
     self.params['shallow'] = True
     bot_update.ensure_checkout(**self.params)
     return self.call.records
 
 
 if __name__ == '__main__':
   unittest.main()