Revert "slub: Allow removal of slab caches during boot"

static void sysfs_slab_remove(struct kmem_cache *s)

{

	if (slab_state < SYSFS)

		/*

		 * Sysfs has not been setup yet so no need to remove the

		 * cache from sysfs.

		 */

		return;

	kobject_uevent(&s->kobj, KOBJ_REMOVE);

	kobject_del(&s->kobj);

	kobject_put(&s->kobj);