cgroup: drop cgroup.sane_behavior from global properties

cgroup.sane_behavior is read only (and in fact, the value is always 0), so
we don't need to c/r this value.
Reported-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Acked-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

cgroup.c

@@ -83,7 +83,6 @@ static const char *freezer_props[] = {
 
 static const char *global_props[] = {
 	"cgroup.clone_children",
-	"cgroup.sane_behavior",
 	"notify_on_release",
 	"cgroup.procs",
 	"tasks",