Remove a few TODOs

Bug: 1044139
Change-Id: Ia0d837c2c5d568d23d8dd53f97124c4fc61dc5e6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2233601
Commit-Queue: Ian Wells <iwells@chromium.org>
Commit-Queue: Dan H <harringtond@chromium.org>
Auto-Submit: Ian Wells <iwells@chromium.org>
Reviewed-by: Dan H <harringtond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#775770}

components/feed/core/v2/feed_store.h

@@ -95,10 +95,6 @@ class FeedStore {
   void WriteMetadata(feedstore::Metadata metadata,
                      base::OnceCallback<void(bool)> callback);
 
-  // TODO(iwells): implement this
-  // Deletes old records that are no longer needed
-  // void RemoveOldData(base::OnceCallback<void(bool)> callback);
-
   bool IsInitializedForTesting() const;
 
   leveldb_proto::ProtoDatabase<feedstore::Record>* GetDatabaseForTesting() {
@@ -151,11 +147,6 @@ class FeedStore {
       bool read_ok,
       std::unique_ptr<feedstore::Record> record);
 
-  // TODO(iwells): implement
-  // bool OldRecordFilter(const std::string& key);
-  // void OnRemoveOldDataFinished(base::OnceCallback<void(bool)> callback,
-  //                             bool success);
-
   base::OnceClosure initialize_callback_;
   leveldb_proto::Enums::InitStatus database_status_;
   std::unique_ptr<leveldb_proto::ProtoDatabase<feedstore::Record>> database_;