prerm is in libvdk2-2c2 2.4.0-5.2.
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 | #!/bin/sh -e
if [ \( "$1" = "upgrade" -o "$1" = "remove" \) -a -L /usr/doc/libvdk1 ]; then
rm -f /usr/doc/libvdk1
fi
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