prerm is in libtowitoko2 2.0.7-9.
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 | #!/bin/sh
#
# prerm remove 
# old-prerm upgrade new-version 
# new-prerm failed-upgrade old-version 
# conflictor's-prerm remove in-favour package new-version 
# deconfigured's-prerm deconfigure in-favour package-being-installed version removing conflicting-package version 
#
set -e 
case "$1" in
    remove|upgrade|deconfigure)
    # remove reader.conf definition for Towitoko 
    rm -f /etc/reader.conf.d/libtowitoko2
    ;;
esac
 |