diff --git a/sys/cam/cam_sim.h b/sys/cam/cam_sim.h
--- a/sys/cam/cam_sim.h
+++ b/sys/cam/cam_sim.h
@@ -102,8 +102,6 @@
 	int			max_tagged_dev_openings;
 	int			max_dev_openings;
 	u_int32_t		flags;
-#define	CAM_SIM_REL_TIMEOUT_PENDING	0x01
-	struct callout		callout;
 	struct cam_devq 	*devq;	/* Device Queue to use for this SIM */
 	int			refcount; /* References to the SIM. */
 	device_t		sim_dev; /* For attached peripherals. */
diff --git a/sys/cam/cam_sim.c b/sys/cam/cam_sim.c
--- a/sys/cam/cam_sim.c
+++ b/sys/cam/cam_sim.c
@@ -126,7 +126,6 @@
 	sim->refcount = 1;
 	sim->devq = queue;
 	sim->mtx = mtx;
-	callout_init(&sim->callout, 1);
 	return (sim);
 }
 
diff --git a/sys/cam/cam_xpt.c b/sys/cam/cam_xpt.c
--- a/sys/cam/cam_xpt.c
+++ b/sys/cam/cam_xpt.c
@@ -4607,15 +4607,6 @@
 	} else
 		devq->send_queue.qfrozen_cnt--;
 	if (devq->send_queue.qfrozen_cnt == 0) {
-		/*
-		 * If there is a timeout scheduled to release this
-		 * sim queue, remove it.  The queue frozen count is
-		 * already at 0.
-		 */
-		if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
-			callout_stop(&sim->callout);
-			sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
-		}
 		if (run_queue) {
 			/*
 			 * Now that we are unfrozen run the send queue.