linux-image: Remove unnecessary debconf initialisations

Only the prerm and postrm scripts need it now.

Also remove the Pre-Depends relation to debconf.

debian/changelog

@@ -17,6 +17,7 @@ linux (4.4-1~exp2) UNRELEASED; urgency=medium
   [ Ben Hutchings ]
   * linux-image: Make failure of depmod fatal, rather than asking what to do
   * [mips*] linux-image: Remove debconf question for requirement of initramfs
+  * linux-image: Remove unnecessary debconf initialisations
 
  -- Ian Campbell <ijc@debian.org>  Sat, 23 Jan 2016 08:23:05 +0000
 

debian/templates/control.image.in

@@ -1,6 +1,5 @@
 Package: linux-image-@abiname@@localversion@
 Build-Profiles: <!stage1>
-Pre-Depends: debconf | debconf-2.0
 Depends: kmod, linux-base, ${misc:Depends}
 Recommends: firmware-linux-free, ${kernel:Recommends}
 Suggests: linux-doc-@version@, debian-kernel-handbook

debian/templates/image.postinst.in

@@ -3,10 +3,7 @@
 use strict;
 use warnings;
 use Cwd 'abs_path';
-use Debconf::Client::ConfModule qw(:all);
 use POSIX ();
-version('2.0');
-my $capb = capb('backup', 'escape');
 
 $|=1;
 

debian/templates/image.preinst.in

@@ -4,10 +4,6 @@ use strict;
 use warnings;
 use POSIX ();
 
-use Debconf::Client::ConfModule qw(:all);
-version('2.0');
-my $capb=capb("backup");
-
 $|=1;
 
 # Predefined values: