iomap: remove superflous mark_page_accessed from iomap_write_actor

This catches up with commit  2457ae ("mm: non-atomically mark page
accessed during page cache allocation where possible"), which
moved the initial access marking into the pagecache allocator.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/iomap.c

@@ -199,7 +199,6 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 		pagefault_enable();
 
 		flush_dcache_page(page);
-		mark_page_accessed(page);
 
 		status = iomap_write_end(inode, pos, bytes, copied, page);
 		if (unlikely(status < 0))