prerm is in snd-nox 18.1-1.
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  | #!/bin/sh -e
set -e 
FLAVOR=".nox"
case "$1" in
    (remove|deconfigure)
        update-alternatives --remove snd /usr/bin/snd${FLAVOR}
    ;;
    (upgrade)
    ;;
    (failed-upgrade)
    ;;
    (*)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 0
    ;;
esac
exit 0
 |