[Sync] ModelTypeStore factory shouldn't require valid PSS to function correctly

components/browser_sync/profile_sync_test_util.cc

Index: components/browser_sync/profile_sync_test_util.cc
diff --git a/components/browser_sync/profile_sync_test_util.cc b/components/browser_sync/profile_sync_test_util.cc
index c6d34511b40d71eb204eaf646f2921d4074bdca8..ee186d14d3c41cfdd6ee09c2463b6fcb3637eacd 100644
--- a/components/browser_sync/profile_sync_test_util.cc
+++ b/components/browser_sync/profile_sync_test_util.cc
@@ -261,10 +261,6 @@ ProfileSyncService::InitParams ProfileSyncServiceBundle::CreateBasicInitParams(
   init_params.url_request_context = url_request_context();
   init_params.debug_identifier = "dummyDebugName";
   init_params.channel = version_info::Channel::UNKNOWN;
-  init_params.blocking_task_runner =
-      worker_pool_owner_.pool()->GetSequencedTaskRunnerWithShutdownBehavior(
-          worker_pool_owner_.pool()->GetSequenceToken(),
-          base::SequencedWorkerPool::SKIP_ON_SHUTDOWN);
 
   return init_params;
 }