block: drop bdrv_has_async_rw()
Commit cd74d83345e0e3b708330ab8c4cd9111bb82cda6 ("block: switch
bdrv_read()/bdrv_write() to coroutines") removed the bdrv_has_async_rw()
callers.  This patch removes bdrv_has_async_rw() since it is no longer
used.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
			
			
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			@ -1027,12 +1027,6 @@ static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num,
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                                   nb_sectors * BDRV_SECTOR_SIZE);
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}
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static inline bool bdrv_has_async_rw(BlockDriver *drv)
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{
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    return drv->bdrv_co_readv != bdrv_co_readv_em
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        || drv->bdrv_aio_readv != bdrv_aio_readv_em;
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}
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static inline bool bdrv_has_async_flush(BlockDriver *drv)
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{
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    return drv->bdrv_aio_flush != bdrv_aio_flush_em;
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