/usr/share/debhelper/autoscripts/postrm-hunspell is in dictionaries-common-dev 1.27.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | rmscript="update-dictcommon-hunspell"
case "$1" in abort-install|remove)
if which $rmscript > /dev/null 2>&1; then
$rmscript
else
echo "Warning: $rmscript not present or executable." >&2
fi
esac
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