* gnu/installer/parted.scm (data-partition?, metadata-partition?, freespace-partition?, normal-partition?, extended-partition?, logical-partition?): Remove, as now provided by Guile-Parted. * gnu/installer/newt/partition.scm (run-disk-page): Remove disk-destroy calls, replace disk-delete-all by disk-remove-all-partitions and disk-delete-partition by disk-remove-partition*.