Remove enhanced bookmarks sync experiment

chrome/browser/sync/profile_sync_service.cc

Index: chrome/browser/sync/profile_sync_service.cc
diff --git a/chrome/browser/sync/profile_sync_service.cc b/chrome/browser/sync/profile_sync_service.cc
index 34b8560cc3fc840eeba05f3bb0bd66ea3f97b31c..7ea11bc436346c347ce2cec75874136c9a0a2ee3 100644
--- a/chrome/browser/sync/profile_sync_service.cc
+++ b/chrome/browser/sync/profile_sync_service.cc
@@ -24,7 +24,6 @@
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
-#include "chrome/browser/bookmarks/enhanced_bookmarks_features.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ -1164,19 +1163,6 @@ void ProfileSyncService::OnExperimentsChanged(
       autofill::prefs::kAutofillWalletSyncExperimentEnabled,
       experiments.wallet_sync_enabled);
 
-  if (experiments.enhanced_bookmarks_enabled) {
-    profile_->GetPrefs()->SetString(
-        sync_driver::prefs::kEnhancedBookmarksExtensionId,
-        experiments.enhanced_bookmarks_ext_id);
-  } else {
-    profile_->GetPrefs()->ClearPref(
-        sync_driver::prefs::kEnhancedBookmarksExtensionId);
-  }
-  UpdateBookmarksExperimentState(
-      profile_->GetPrefs(), g_browser_process->local_state(), true,
-      experiments.enhanced_bookmarks_enabled ? BOOKMARKS_EXPERIMENT_ENABLED :
-                                               BOOKMARKS_EXPERIMENT_NONE);
-
   // If this is a first time sync for a client, this will be called before
   // OnBackendInitialized() to ensure the new datatypes are available at sync
   // setup. As a result, the migrator won't exist yet. This is fine because for