Remove ignored "force" parameter from bot_update.

infra/recipes/blink_downstream.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.
 
 """
 This recipe can be used by components like v8 to verify blink tests with a
 low false positive rate. Similar to a trybot, this recipe compares test
 failures from a build with a current component revision with test failures
 from a build with a pinned component revision.
 
@@ skipping 123 matching lines @@
 
   context = {}
   checkout_dir = api.chromium_checkout.get_checkout_dir(bot_config)
   if checkout_dir:
     context['cwd'] = checkout_dir
 
   # Run all steps in the checkout dir (consistent with chromium_tests).
   with api.step.context(context):
     # TODO(phajdan.jr): remove redundant **context below once we fix things
     # to behave the same without it.
-    step_result = api.bot_update.ensure_checkout(force=True, **context)
+    step_result = api.bot_update.ensure_checkout(**context)
 
     api.chromium.ensure_goma()
 
     api.chromium.c.project_generator.tool = 'mb'
     api.chromium.runhooks()
 
     api.chromium_tests.run_mb_and_compile(
         ['blink_tests'], [],
         name_suffix=' (with patch)',
     )
 
     api.chromium.runtest('webkit_unit_tests', xvfb=True)
 
     def component_pinned_fn(_failing_steps):
       bot_update_json = step_result.json.output
       api.gclient.c.revisions['src'] = str(
           bot_update_json['properties']['got_cr_revision'])
       # Reset component revision to the pinned revision from chromium's DEPS
       # for comparison.
       del api.gclient.c.revisions[bot_config['component']['path']]
       # Update without changing got_revision. The first sync is the revision
       # that is tested. The second is just for comparison. Setting got_revision
       # again confuses the waterfall's console view.
-      api.bot_update.ensure_checkout(force=True, update_presentation=False)
+      api.bot_update.ensure_checkout(update_presentation=False)
 
       api.chromium_tests.run_mb_and_compile(
           ['blink_tests'], [],
           name_suffix=' (without patch)',
       )
 
     extra_args = list(bot_config.get('test_args', []))
     if bot_config.get('additional_expectations'):
       extra_args.extend([
         '--additional-expectations',
@@ skipping 89 matching lines @@
   # and compare the lists of failing tests).
   yield (
     api.test('too_many_failures_for_retcode') +
     properties('client.v8.fyi', 'V8-Blink Linux 64') +
     api.override_step_data(with_patch,
                            canned_test(passing=False,
                                        num_additional_failures=125)) +
     api.override_step_data(without_patch,
                            canned_test(passing=True, minimal=True))
   )