/usr/share/debhelper/autoscripts/prerm-click is in click-dev 0.4.43+16.04.20160203-0ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | if which click >/dev/null 2>&1; then
click hook remove #HOOK#
fi
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