clean up docker start script

Signed-off-by: Justin Cormack <justin.cormack@unikernel.com>

alpine/packages/docker/etc/init.d/docker

@@ -1,6 +1,4 @@
 #!/sbin/openrc-run
-# Copyright 1999-2013 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
 
 command="${DOCKER_BINARY:-/usr/bin/docker}"
 pidfile="${DOCKER_PIDFILE:-/run/${RC_SVCNAME}.pid}"
@@ -8,23 +6,3 @@ command_args="daemon -p \"${pidfile}\" ${DOCKER_OPTS}"
 DOCKER_LOGFILE="${DOCKER_LOGFILE:-/var/log/${RC_SVCNAME}.log}"
 start_stop_daemon_args="--background \
         --stderr \"${DOCKER_LOGFILE}\" --stdout \"${DOCKER_LOGFILE}\""
-
-grsecdir=/proc/sys/kernel/grsecurity
-
-start_pre() {
-        checkpath -f -m 0644 -o root:docker "$DOCKER_LOGFILE"
-        for i in $disable_grsec; do
-                if [ -e "$grsecdir/$i" ]; then
-                        einfo " Disabling $i"
-                        echo 0 > "$grsecdir/$i"
-                fi
-        done
-
-        ulimit -n 1048576
-
-	# temporary for alpha 4
-	rm -rf /var/lib/docker/overlay
-	rm -f /var/lib/docker/repositories-overlay
-
-        return 0
-}