prerm is in postgresql-contrib-9.3 9.3.24-0ubuntu0.14.04.
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 | #!/bin/sh
set -e
VERSION=9.3
if [ "$1" = remove ]; then
. /usr/share/postgresql-common/maintscripts-functions
remove_contrib_version $VERSION
fi
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