[Offline Pages] Removes two-step expiration related.

components/offline_pages/downloads/download_ui_adapter.cc

Index: components/offline_pages/downloads/download_ui_adapter.cc
diff --git a/components/offline_pages/downloads/download_ui_adapter.cc b/components/offline_pages/downloads/download_ui_adapter.cc
index bb398cb8f025d372546d0d669b1137e76a555acd..df7be3489f6bca4d4498821a4729b23d6b1efd25 100644
--- a/components/offline_pages/downloads/download_ui_adapter.cc
+++ b/components/offline_pages/downloads/download_ui_adapter.cc
@@ -123,9 +123,6 @@ void DownloadUIAdapter::DeleteItem(const std::string& guid) {
 
   std::vector<int64_t> page_ids;
   page_ids.push_back(it->second->offline_id);
-  // TODO(dimich): This should be ExpirePages(...Now()..) when Expire is
-  // firing Observer method. The resulting Observer notification will update
-  // local cache.
   model_->DeletePagesByOfflineId(
       page_ids, base::Bind(&DownloadUIAdapter::OnDeletePagesDone,
                            weak_ptr_factory_.GetWeakPtr()));