ide-tape: remove dead USE_IOTRACE code

Index: b/drivers/ide/ide-tape.c
===================================================================
@@ -615,16 +615,6 @@ typedef struct os_dat_s {
 /*************************** End of tunable parameters ***********************/
 
 /*
- *	Debugging/Performance analysis
- *
- *	I/O trace support
- */
-#define USE_IOTRACE	0
-#if USE_IOTRACE
-#define IO_IDETAPE_FIFO	500
-#endif
-
-/*
  *	Read/Write error simulation
  */
 #define SIMULATE_ERRORS			0

@@ -2502,9 +2492,6 @@ static ide_startstop_t idetape_do_reques
 	}
 	if (rq->cmd[0] & REQ_IDETAPE_READ) {
 		tape->buffer_head++;
-#if USE_IOTRACE
-		IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
 		tape->postpone_cnt = 0;
 		pc = idetape_next_pc_storage(drive);
 		idetape_create_read_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);

@@ -2512,9 +2499,6 @@ static ide_startstop_t idetape_do_reques
 	}
 	if (rq->cmd[0] & REQ_IDETAPE_WRITE) {
 		tape->buffer_head++;
-#if USE_IOTRACE
-		IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
 		tape->postpone_cnt = 0;
 		pc = idetape_next_pc_storage(drive);
 		idetape_create_write_cmd(tape, pc, rq->current_nr_sectors, (struct idetape_bh *)rq->special);

@@ -3241,9 +3225,6 @@ static int idetape_add_chrdev_write_requ
 	idetape_switch_buffers(tape, new_stage);
 	idetape_add_stage_tail(drive, new_stage);
 	tape->pipeline_head++;
-#if USE_IOTRACE
-	IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
 	calculate_speeds(drive);
 
 	/*

@@ -3493,9 +3474,6 @@ static int idetape_add_chrdev_read_reque
 		idetape_remove_stage_head(drive);
 		spin_unlock_irqrestore(&tape->spinlock, flags);
 		tape->pipeline_head++;
-#if USE_IOTRACE
-		IO_trace(IO_IDETAPE_FIFO, tape->pipeline_head, tape->buffer_head, tape->tape_head, tape->minor);
-#endif
 		calculate_speeds(drive);
 	}
 #if IDETAPE_DEBUG_BUGS