slab: remove PARTIAL_NODE slab_state

The PARTIAL_NODE slab_state has gone with SLAB removed, so just
remove it.

Signed-off-by: Chengming Zhou <[e-mail]>
Signed-off-by: Vlastimil Babka <[e-mail]>

mm/slab.h

···
 enum slab_state {
 	DOWN,			/* No slab functionality yet */
 	PARTIAL,		/* SLUB: kmem_cache_node available */
-	PARTIAL_NODE,		/* SLAB: kmalloc size for node struct available */
 	UP,			/* Slab caches usable but not all extras yet */
 	FULL			/* Everything is working */
 };

tools/include/linux/slab.h

···
 enum slab_state {
 	DOWN,
 	PARTIAL,
-	PARTIAL_NODE,
 	UP,
 	FULL
 };