iscsi-target: Drop left-over iscsi_conn->bad_hdr

All REJECT response setup of the rejected payload is now done using
on-demand cmd->buf_ptr allocations.

Go ahead and remove dead iscsi_conn->bad_hdr usage rx_opcode path
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>

drivers/target/iscsi/iscsi_target.c

@@ -4105,11 +4105,6 @@ int iscsi_target_rx_thread(void *arg)
 			goto transport_err;
 		}
 
-		/*
-		 * Set conn->bad_hdr for use with REJECT PDUs.
-		 */
-		memcpy(&conn->bad_hdr, &buffer, ISCSI_HDR_LEN);
-
 		if (conn->conn_ops->HeaderDigest) {
 			iov.iov_base	= &digest;
 			iov.iov_len	= ISCSI_CRC_LEN;

drivers/target/iscsi/iscsi_target_core.h

@@ -532,8 +532,6 @@ struct iscsi_conn {
 	u32			of_marker;
 	/* Used for calculating OFMarker offset to next PDU */
 	u32			of_marker_offset;
-	/* Complete Bad PDU for sending reject */
-	unsigned char		bad_hdr[ISCSI_HDR_LEN];
 #define IPV6_ADDRESS_SPACE				48
 	unsigned char		login_ip[IPV6_ADDRESS_SPACE];
 	unsigned char		local_ip[IPV6_ADDRESS_SPACE];