do not ship config-files rendered from templates

do not ship config-files rendered from templates

while upgrading spamassassin from 3.4.2 to 3.4.3 users were initially asked
to confirm a changed '/etc/mail/spamassassin/init.pre', due to the differences
between the file in the shipped new upstream and the version rendered by the
templateing system of pmg.
This was mitigated by c0e5b8043c8ff69bc909f8b7ae128f9b5ed27e47.

Not shipping the files in the first place removes the need to adapt changed
upstream files to old versions, which get replaced by the templating system
anyways

Signed-off-by: Stoiko Ivanov <s.ivanov@proxmox.com>