Drop udev migration code from pre-wheezy

debian/changelog

@@ -18,6 +18,7 @@ systemd (220-4) UNRELEASED; urgency=medium
   * Stop using /sbin/udevd and drop the compat symlink.
   * Remove any vestiges of /dev/.udev/. This directory has been replaced by
     /run/udev/ since wheezy.
+  * Drop udev migration code from pre-wheezy.
 
  -- Martin Pitt <mpitt@debian.org>  Mon, 01 Jun 2015 15:12:34 +0200
 

debian/udev.postinst

@@ -96,15 +96,6 @@ write_interfaces_rules() {
 }
 
 upgrade_fixes() {
-  if dpkg --compare-versions "$2" lt "171-3"; then
-    # in 171-2 this directory becomes a symlink to libudev0, so it must be
-    # manually deleted because dpkg cannot automatically deal with this
-    if [ -e /usr/share/doc/udev -a ! -L /usr/share/doc/udev ]; then
-      rm -rf /usr/share/doc/udev
-      ln -s libudev0 /usr/share/doc/udev
-    fi
-  fi
-
   if dpkg --compare-versions "$2" lt "204-1"; then
     # We dropped udev-mtab with udev 204.
     update-rc.d udev-mtab remove

debian/udev.preinst

@@ -209,15 +209,6 @@ mask_systemd_service() {
   fi
 }
 
-stop_on_upstart_upgrade() {
-  if which initctl >/dev/null && initctl version | grep -q upstart
-  then
-    # We have to stop udev before we can restart it under upstart in the
-    # postinst.
-    invoke-rc.d udev stop
-  fi
-}
-
 check_version() {
   # $2 is non-empty when installing from the "config-files" state
   [ "$2" ] || return 0
@@ -230,15 +221,7 @@ check_version() {
       check_kernel_version
       check_kernel_features
     fi
-  fi # 168-2
-
-  if dpkg --compare-versions $2 lt 175-1; then
-    rm_conffile /etc/modprobe.d/blacklist.conf
-  fi # 175-1
-
-  if dpkg --compare-versions $2 lt 175-7.1; then
-    stop_on_upstart_upgrade
-  fi # 175-7.1
+  fi # 204-4
 
   if dpkg --compare-versions $2 lt 204-4; then
     # suppress errors when the new rules files contain options not supported by