postrm is in libwebkdc-perl 4.0.2-1.
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 | #!/bin/sh
#
# Remove the cached Template Toolkit compiled templates on removal or purge,
# but leave them alone on upgrades since they probably haven't changed.
set -e
if [ "upgrade" != "$1" ] ; then
rm -rf /var/cache/weblogin
fi
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