prerm is in jython-stilts 3.1.2-2.
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 13 14 15 16 17 18 19 | #!/bin/sh
set -e
JYTHON_DISTDIR=/usr/share/jython/Lib/site-packages
PKG=stilts
case "$1" in
     remove|upgrade|deconfigure)
	 rm -f "${JYTHON_DISTDIR}/${PKG}\$py.class"
	 ;;
     failed-upgrade)
	 exit 0
	 ;;
     *)
	 echo "prerm called with unknown argument '$1'" >&2
	 exit 1
	 ;;
esac
 |