prerm is in asterisk-core-sounds-ru 1.4.27-1.
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 | #! /bin/sh -e
if [ "$1" = "remove" ]; then
update-alternatives --remove asterisk-prompt-ru /usr/share/asterisk/sounds/ru_RU_f_IvrvoiceRU
update-alternatives --remove asterisk-prompt-ru-ru /usr/share/asterisk/sounds/ru_RU_f_IvrvoiceRU
fi
|