Revert "ISCSI fix broken send logic in iscsi_scsi_async_command"

This reverts commit 548bd22f51.

Revert for now. Will check it later today.
Causes 0130 and other tests to fail/hang when sending a solicited data-out

include/iscsi-private.h

@@ -19,8 +19,6 @@
 
 #include <stdint.h>
 #include <time.h>
-/* We need this until we have an iscsi_task to get access to the iovector_out */
-#include "scsi-lowlevel.h"
 
 #if defined(WIN32)
 #include <basetsd.h>
@@ -221,8 +219,6 @@ struct iscsi_pdu {
 
 	int written;
 
-	struct scsi_task *task;     /* Reference to scsi_task to get iov with output data */
-
 	struct iscsi_data outdata; /* Header for PDU to send */
 	uint32_t out_offset;       /* Offset into data-out iovector */
 	uint32_t out_len;          /* Amount of data to sent */