mdmon: don't mkdir /var/run

Creating /var/run in mdmon is really not justifiable.

If /var/run doesn't exist, then it is either deliberate and it should
be left that way to make sure the mapfile gets created in /dev, or
it is a configuration error and not our problem to fix.

Signed-off-by: NeilBrown <neilb@suse.de>

managemon.c

@@ -706,8 +706,6 @@ void do_manager(struct supertype *container)
 				/* If this fails, we hope it already exists
 				 * pid file lives in /var/run/mdadm/mdXX.pid
 				 */
-				mkdir("/var", 0600);
-				mkdir("/var/run", 0600);
 				mkdir("/var/run/mdadm", 0600);
 				close(container->sock);
 				container->sock = make_control_sock(container->devname);