target: Remove unused se_cmd.cmd_spdtl

This was originally for helping fabrics to determine overflow/underflow
status, and has been superceeded by SCF_OVERFLOW_BIT + SCF_UNDERFLOW_BIT.

Signed-off-by: Roland Dreier <[e-mail]>
Signed-off-by: Nicholas Bellinger <[e-mail]>

drivers/target/target_core_transport.c

···
 			" 0x%02x\n", cmd->se_tfo->get_fabric_name(),
 				cmd->data_length, size, cmd->t_task_cdb[0]);
 
-		cmd->cmd_spdtl = size;
-
 		if (cmd->data_direction == DMA_TO_DEVICE) {
 			pr_err("Rejecting underflow/overflow"
 					" WRITE data\n");

include/target/target_core_base.h

···
 	u32			se_ordered_id;
 	/* Total size in bytes associated with command */
 	u32			data_length;
-	/* SCSI Presented Data Transfer Length */
-	u32			cmd_spdtl;
 	u32			residual_count;
 	u32			orig_fe_lun;
 	/* Persistent Reservation key */