Is there anything that can be done?
No, there isn't.
Trust is not moderated, so there is no way to remove those ratings from your trust page unless the person who left them decides to remove them. However, as those two accounts are both neither on default trust and also trusted by nobody, then those ratings will appear as "untrusted" for everyone on the forum. You can click on the profile of pretty much any DT user and see an abundance of fake, frivolous, retaliatory, and otherwise nonsense ratings, as well as similarly nonsense flags. There is nothing you can do except ignore them, and realize that any serious trading partner will be able to see right through them and therefore also be ignoring them.
In short, don't worry about it.