remove preseeding support from __package_apt

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

conf/type/__package_apt/man.text

@@ -25,9 +25,6 @@ OPTIONAL PARAMETERS
 name::
    If supplied, use the name and not the object id as the package name.
 
-preseed::
-   If supplied, use the given filename as input for debconf-set-selections(1)
-
 
 EXAMPLES
 --------
@@ -39,9 +36,6 @@ __package_apt zsh --state installed
 # In case you only want *a* webserver, but don't care which one
 __package_apt webserver --state installed --name nginx
 
-# Install package with defaults (from a type)
-__package_apt postfix --state installed --preseed "$__type/files/postfix-seed"
-
 # Remove obsolete package
 __package_apt puppet --state deinstalled
 --------------------------------------------------------------------------------

conf/type/__package_apt/parameter/optional

@@ -1,3 +1,2 @@
 name
-preseed
 version