scsi: libsas: Delete unused to_dom_device() and to_dev_attr()

These macros are unused and to_dev_attr() will conflict with an upcoming
centralization of general attribute macros.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20260408-libsas-cleanup-v1-1-826325bbc0ba@weissschuh.net
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: t-8ch

include/scsi/libsas.h

@@ -62,10 +62,6 @@ enum discover_event {
 
 /* ---------- Expander Devices ---------- */
 
-#define to_dom_device(_obj) container_of(_obj, struct domain_device, dev_obj)
-#define to_dev_attr(_attr)  container_of(_attr, struct domain_dev_attribute,\
-					 attr)
-
 enum routing_attribute {
 	DIRECT_ROUTING,
 	SUBTRACTIVE_ROUTING,