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.com


Signed-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>