[PATCH v2] fs: clean up usage of noop_dirty_folio

[Matthew Wilcox]

On Mon, Aug 28, 2023 at 03:54:49PM +0800, Xueshi Hu wrote:
> In folio_mark_dirty(), it can automatically fallback to
> noop_dirty_folio() if a_ops->dirty_folio is not registered.
> 
> As anon_aops, dev_dax_aops and fb_deferred_io_aops becames empty, remove
> them too.
> 
> Signed-off-by: Xueshi Hu <xueshi.hu at smartx.com>

Reviewed-by: Matthew Wilcox (Oracle) <willy at infradead.org>