Remove ignored bot_update "force" parameter.

scripts/slave/recipes/nacl.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.
 
 DEPS = [
   'depot_tools/bot_update',
   'depot_tools/gclient',
   'recipe_engine/path',
   'recipe_engine/platform',
   'recipe_engine/properties',
@@ skipping 14 matching lines @@
       'oneiric_32-newlib-arm_hw-pnacl-panda-spec',
     # tryserver.nacl builders
     'nacl-arm_opt_panda':
       'nacl-arm_hw_opt_panda',
     'nacl-arm_perf_panda':
       'nacl-arm_hw_perf_panda',
 }
 
 def _CheckoutSteps(api):
   api.gclient.set_config('nacl')
-  result = api.bot_update.ensure_checkout(force=True)
+  result = api.bot_update.ensure_checkout()
 
   # HACK(iannucci): bot_update.ensure_checkout should return an actual meaninful
   # object with actual meaningful semantics.
   got_revision = result.presentation.properties['got_revision']
   api.gclient.runhooks()
   return got_revision
 
 def _AnnotatedStepsSteps(api, got_revision):
   # Default environemnt; required by all builders.
   env = {
@@ skipping 52 matching lines @@
       mastername = 'client.nacl',
       buildername = 'oneiric_32-newlib-arm_hw-pnacl-panda-dbg',
       revision = 'abcd',
       slavename='TestSlave',
       buildnumber = 5678,
       parent_slavename = 'TestSlave',
       parent_buildername = 'precise_64-newlib-arm_qemu-pnacl-dbg',
       parent_buildnumber = 1,
       slavetype = 'BuilderTester',
     ))