postrm is in acl 2.2.52-3build1.
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 | #!/bin/sh
set -e
if [ "$1" = 'remove' ]; then
for file in chacl getfacl setfacl; do
if [ -L /usr/bin/$file ]; then
rm /usr/bin/$file
fi
done
fi
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