/usr/share/debhelper/autoscripts/postrm-xfonts is in debhelper 9.20120115ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | if [ -x "`which update-fonts-dir 2>/dev/null`" ]; then
#CMDS#
fi
|