This file is indexed.

postrm is in xfsdump 3.1.6+nmu1.

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.

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#!/bin/sh
set -e

if [ "$1" = 'remove' ]; then
  for file in xfsdump xfsrestore; do
    if [ -L /usr/sbin/$file ]; then
      rm /usr/sbin/$file
    fi
  done
fi