Deleting Old Models from iModel


We deleted a connection to our imodel but ran into failures when we selected "Delete all synchronized changes from an iModel" and because of those failures we instead chose "Keep already synchronized changes" and only then the connection was able to be deleted.

Afterwards, new connections were made to the correct file but the old models are still existing in the iModel and is causing duplicated data.  Is there a way to delete these models from the iModel even though the connections no longer exists?