scsi: zfcp: Remove orphaned function declarations

drivers/s390/scsi/zfcp_ext.h: zfcp_sg_free_table - only declaration left
after commit 58f3ead ("scsi: zfcp: move SG table helper from aux to fc
and make them static")

drivers/s390/scsi/zfcp_ext.h: zfcp_sg_setup_table - only declaration left
after commit 58f3ead ("scsi: zfcp: move SG table helper from aux to fc
and make them static")

Link: https://lore.kernel.org/r/6854ae03c5c65805f746774eeb0f2869fcd6c397.1603908167.git.bblock@linux.ibm.com
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/s390/scsi/zfcp_ext.h

@@ -20,8 +20,6 @@ extern struct zfcp_port *zfcp_get_port_by_wwpn(struct zfcp_adapter *, u64);
 extern struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *);
 extern struct zfcp_port *zfcp_port_enqueue(struct zfcp_adapter *, u64, u32,
 					   u32);
-extern void zfcp_sg_free_table(struct scatterlist *, int);
-extern int zfcp_sg_setup_table(struct scatterlist *, int);
 extern void zfcp_adapter_release(struct kref *);
 extern void zfcp_adapter_unregister(struct zfcp_adapter *);