scsi: sd_zbc: Remove unused inline functions

These are no longer used and can be removed.

Link: https://lore.kernel.org/r/20200715025523.34620-1-yuehaibing@huawei.comReviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/sd.h

@@ -229,17 +229,11 @@ blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba,
 
 #else /* CONFIG_BLK_DEV_ZONED */
 
-static inline int sd_zbc_init(void)
-{
-	return 0;
-}
-
 static inline int sd_zbc_init_disk(struct scsi_disk *sdkp)
 {
 	return 0;
 }
 
-static inline void sd_zbc_exit(void) {}
 static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {}
 
 static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,