The simple way for deleting a package is to edit /mnt/tux/vmt/boot.lst remove the package and reboot the system.
Without rebooting the experimental program vmt-uninstall can be used.
However this can result in a corrupted system, because of the removal of links.
When installing a package the links are made and can override other files/links.
Removing those links does not restore overwritten files/links.
Therefore first option is preferred.