Remove workaround in Sync supervised users test

chrome/browser/sync/test/integration/single_client_supervised_user_settings_sync_test.cc

Index: chrome/browser/sync/test/integration/single_client_supervised_user_settings_sync_test.cc
diff --git a/chrome/browser/sync/test/integration/single_client_supervised_user_settings_sync_test.cc b/chrome/browser/sync/test/integration/single_client_supervised_user_settings_sync_test.cc
index 846203b4287c6e01fcd689882146a35ab80ac6b4..bab4a0807c1aa96ebbe4ab1e88327f2625210b8c 100644
--- a/chrome/browser/sync/test/integration/single_client_supervised_user_settings_sync_test.cc
+++ b/chrome/browser/sync/test/integration/single_client_supervised_user_settings_sync_test.cc
@@ -52,9 +52,6 @@ IN_PROC_BROWSER_TEST_F(SingleClientSupervisedUserSettingsSyncTest, Sanity) {
       std::string("token value doesn't matter in tests"));
 
   ASSERT_TRUE(GetClient(0)->AwaitBackendInitialization());
-  // TODO(pvalenzuela): Remove the following line after crbug.com/422508 is
-  // fixed.
-  GetSyncService(0)->SetSetupInProgress(false);
   ASSERT_TRUE(GetClient(0)->AwaitSyncSetupCompletion());
 
   // TODO(pvalenzuela): Add additional tests and some verification of sync-