mm/z3fold.c: remove useless code in z3fold_page_isolate

Remove duplicate and useless code.

Link: http://lkml.kernel.org/r/20190829191312.GA20298@embeddedor
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Vitaly Wool <vitalywool@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
1 file changed