Archives are going to be deleted as they can not be imported and they are a large security hack risk based on the old software.
...although if they've been deleted that might be somewhat difficult...It would be nice to have them. But since they require very old software...
It might be best to remove the links to them. To avoid this question again.
And we can all hope for their restoration when someone can write the required conversion software.
Deleted or left on an old backup tape?...although if they've been deleted that might be somewhat difficult...