postrm is in minirok 2.1-1.
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 10 11 | #! /bin/sh
set -e
if [ "$1" = "remove" ]; then
    if which "kde4-config" >/dev/null 2>&1; then
        touch "`kde4-config --expandvars --install icon`/hicolor"
    else
        touch "/usr/share/icons/hicolor"
    fi
fi
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