metering: add note about archive removal

src/metering/metering.cpp

@@ -561,7 +561,7 @@ bool MeteringImpl::recreateDeadArchives(const std::vector<ArchiveId>& archiveIds
   for (const auto& archiveId : archiveIds) {
     if (m_archives->withoutUpdates(archiveId)) {
       DS_WARNING("Metering DB ", m_archives->filename(archiveId), " is out of date. removing ");
-      m_archives->create(archiveId);
+      m_archives->create(archiveId); // bogus, file is not removed, TODO add unit test to verify
       restartCached = true;
     }
   }