block_dev: remove DAX leftovers
DAX support for block devices was removed in commits 03cdad ("block: disable block device DAX by default") and 99a01cdf ("block: remove BLK_DEV_DAX config option"), but we still kept a call to dax_do_io and some uneeded i_flags manipulations introduced in commit bbab37 ("block: Add support for DAX reads/writes to block devices"). Remove those leftovers. Signed-off-by: NChristoph Hellwig <hch@lst.de> Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de> Acked-by: NDan Williams <dan.j.williams@intel.com> Signed-off-by: NJens Axboe <axboe@fb.com>
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