This file is indexed.

postrm is in gitweb 1:2.7.4-0ubuntu1.

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

dpkg-maintscript-helper mv_conffile \
  /etc/apache2/conf.d/gitweb /etc/apache2/conf-available/gitweb.conf \
  1:2.1.4-2~ -- "$@"

test "$1" = remove || test "$1" = purge || exit 0

# This should not be needed because prerm already disabled the
# configuration.  Try again in case Apache was not installed at
# prerm time and has been reinstalled since then.
if [ -e /usr/share/apache2/apache2-maintscript-helper ]; then
  . /usr/share/apache2/apache2-maintscript-helper
  apache2_invoke disconf gitweb || exit
fi