prerm is in jed-common 1:0.99.19-2.1.
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 23 24 25 26 27 28 29 30 31 32 | #!/bin/sh
set -e
case "$1" in
    remove|upgrade|deconfigure)
        TEMP=$(tempfile)
        printf "Running /usr/share/jed/compile/jed-common..."
        RET=0
        /usr/share/jed/compile/jed-common remove >$TEMP 2>&1 || RET=$?
        if test "$RET" -ne 0 ; then
            echo "failed (see $TEMP)"
            exit $RET
        fi
        echo "done"
        rm -f $TEMP
    ;;
    failed-upgrade)
    ;;
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac
exit 0
 |