prerm is in stardata-common 0.7.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #! /bin/sh
set -e
case "$1" in
    remove|upgrade|deconfigure)
	for file in /usr/lib/stardata-common/*; do
	    if [ -x $file ] ; then
		name=`basename $file`
		register-stardata remove all $name
	    fi
	done
        ;;
    failed-upgrade)
        ;;
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
exit 0
 |