vhost/scsi: Remove unused but set variable

Remove the unused but set variable se_tpg in vhost_scsi_nexus_cb() to
fix the following GCC warning when building with 'W=1':

  drivers/vhost/scsi.c:1752:26: warning: variable ‘se_tpg’ set but not used
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/vhost/scsi.c

@@ -1749,7 +1749,6 @@ static int vhost_scsi_nexus_cb(struct se_portal_group *se_tpg,
 static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
 				const char *name)
 {
-	struct se_portal_group *se_tpg;
 	struct vhost_scsi_nexus *tv_nexus;
 
 	mutex_lock(&tpg->tv_tpg_mutex);
@@ -1758,7 +1757,6 @@ static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
 		pr_debug("tpg->tpg_nexus already exists\n");
 		return -EEXIST;
 	}
-	se_tpg = &tpg->se_tpg;
 
 	tv_nexus = kzalloc(sizeof(struct vhost_scsi_nexus), GFP_KERNEL);
 	if (!tv_nexus) {