net/rds: remove variable total_copied

Variable total_copied is just being incremented and it's never used
anywhere else. The variable and the increment are redundant so
remove it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20221024135046.2159523-1-colin.i.king@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/rds/message.c

@@ -366,7 +366,6 @@ static int rds_message_zcopy_from_user(struct rds_message *rm, struct iov_iter *
 	struct scatterlist *sg;
 	int ret = 0;
 	int length = iov_iter_count(from);
-	int total_copied = 0;
 	struct rds_msg_zcopy_info *info;
 
 	rm->m_inc.i_hdr.h_len = cpu_to_be32(iov_iter_count(from));
@@ -404,7 +403,6 @@ static int rds_message_zcopy_from_user(struct rds_message *rm, struct iov_iter *
 			ret = -EFAULT;
 			goto err;
 		}
-		total_copied += copied;
 		length -= copied;
 		sg_set_page(sg, pages, copied, start);
 		rm->data.op_nents++;