scsi: target: Remove redundant assignment to variable 'ret'

The variable ret has been initialized with a value '0'. The assignment in
switch-case is redundant. Remove it.

Link: https://lore.kernel.org/r/20200914023207.113792-1-jingxiangfeng@huawei.com
Reviewed-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/target/iscsi/iscsi_target.c

@@ -4529,7 +4529,6 @@ int iscsit_logout_post_handler(
 			iscsit_logout_post_handler_closesession(conn);
 			break;
 		}
-		ret = 0;
 		break;
 	case ISCSI_LOGOUT_REASON_CLOSE_CONNECTION:
 		if (conn->cid == cmd->logout_cid) {
@@ -4540,7 +4539,6 @@ int iscsit_logout_post_handler(
 				iscsit_logout_post_handler_samecid(conn);
 				break;
 			}
-			ret = 0;
 		} else {
 			switch (cmd->logout_response) {
 			case ISCSI_LOGOUT_SUCCESS: