prerm is in libapache2-mod-auth-tkt 2.1.0+dfsg-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 | #!/bin/sh
set -e
# Automatically added by dh_apache2
if [ "$1" = "remove" ] || [ "$1" = "deconfigure" ] ; then
	if true; then
		if [ -e /usr/share/apache2/apache2-maintscript-helper ] ; then
			. /usr/share/apache2/apache2-maintscript-helper
			for conf in auth_tkt  ; do
				apache2_invoke dismod $conf  || exit $?
			done
		fi
	fi
fi
# End automatically added section
 |