mm: shmem: remove unused info variable

mm: shmem: remove unused info variable

Fix the following warning by removing the unused variable:

  mm/shmem.c:3205:27: warning: variable 'info' set but not used [-Wunused-but-set-variable]

Link: http://lkml.kernel.org/r/1510774029-30652-1-git-send-email-clabbe@baylibre.com
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>