Revert "Work around "udev >=208-6 without systemd" bug with loopback …

…device, causing serious boot delay"

This reverts commit be7f20b.
This actually breaks all the other network devices. :(

debian/grml-udev-config.grml-udev.init

@@ -81,13 +81,6 @@ case "$1" in
           printf 'Warning: /etc/grml/autoconfig.functions could not be read.\n'>&2
         fi
 
-        # ugly workaround to get udev >=208-6 without systemd working
-        # without long delay during udev startup :( more details at
-        # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=754987
-        if cat /sys/class/net/lo/operstate 2>/dev/null | grep -q 'down' ; then
-          ip link set dev lo up
-        fi
-
         # support bootoption noudev and inform user how to skip
         # execution of udev (being bootoption noudev)
         if ! grep -q noudev /proc/cmdline ; then