This is always an empty list or NULL with the removal of the ->readahead
support, so remove it.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NAl Viro <viro@zeniv.linux.org.uk>
Acked-by: NAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: NMatthew Wilcox (Oracle) <willy@infradead.org>