kobject: remove unused KOBJ_MAX action

The loop in libb/kobj_uevent.c that checked for KOBBJ_MAX is no longer
present, we do a much more sane ARRAY_SIZE() check instead. See
5c5daf65

 ("Driver core: exclude kobject_uevent.c for
!CONFIG_HOTPLUG").

Signed-off-by: Garrit Franke <garritfranke@gmail.com>
Link: https://lore.kernel.org/r/20200716203100.7959-1-garritfranke@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>