include/linux/vmstat.h: remove unused page state adjustment macro

These four macro are not used anymore.

Just remove them.

Link: http://lkml.kernel.org/r/20181214063211.2290-1-richard.weiyang@gmail.comSigned-off-by: Wei Yang <richard.weiyang@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/vmstat.h

@@ -239,11 +239,6 @@ extern unsigned long node_page_state(struct pglist_data *pgdat,
 #define node_page_state(node, item) global_node_page_state(item)
 #endif /* CONFIG_NUMA */
 
-#define add_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, __d)
-#define sub_zone_page_state(__z, __i, __d) mod_zone_page_state(__z, __i, -(__d))
-#define add_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, __d)
-#define sub_node_page_state(__p, __i, __d) mod_node_page_state(__p, __i, -(__d))
-
 #ifdef CONFIG_SMP
 void __mod_zone_page_state(struct zone *, enum zone_stat_item item, long);
 void __inc_zone_page_state(struct page *, enum zone_stat_item);