Get rid of transitionary patch_root cleanup hacks.

scripts/slave/recipe_modules/v8/api.py

 # Copyright 2013 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 argparse
 import datetime
 import random
 import re
 import urllib
 
@@ skipping 145 matching lines @@
     solution = self.m.gclient.c.solutions[0]
     branch = self.m.properties.get('branch', 'master')
     needs_branch_heads = False
     if RELEASE_BRANCH_RE.match(branch):
       revision = 'refs/branch-heads/%s:%s' % (branch, revision)
       needs_branch_heads = True
 
     solution.revision = revision
     update_step = self.m.bot_update.ensure_checkout(
         no_shallow=True,
-        patch_root='TODO(TANDRII): REMOVE THIS TRANSITION TO patch_projects',
         output_manifest=True,
         with_branch_heads=needs_branch_heads,
         **kwargs)
 
     assert update_step.json.output['did_run']
 
     # Bot_update maintains the properties independent of the UI
     # presentation.
     self.revision = self.m.bot_update.last_returned_properties['got_revision']
     self.revision_cp = (
@@ skipping 949 matching lines @@
   def report_culprits(self, culprit_range):
     assert culprit_range
     if len(culprit_range) > 1:
       text = 'Suspecting multiple commits'
     else:
       text = 'Suspecting %s' % culprit_range[0][:8]
 
     step_result = self.m.step(text, cmd=None)
     for culprit in culprit_range:
       step_result.presentation.links[culprit[:8]] = COMMIT_TEMPLATE % culprit