Sleeping on intensity decrease is broken, remove it.
diff --git a/driver-opencl.c b/driver-opencl.c
index 0bfd805..8df0b10 100644
--- a/driver-opencl.c
+++ b/driver-opencl.c
@@ -1509,8 +1509,6 @@ static int64_t opencl_scanhash(struct thr_info *thr, struct work *work,
if (gpu->gpu_us_average > dynamic_us) {
if (gpu->intensity > MIN_INTENSITY)
--gpu->intensity;
- else
- nmsleep(gpu->gpu_us_average - dynamic_us);
} else if (gpu->gpu_us_average < dynamic_us / 2) {
if (gpu->intensity < MAX_INTENSITY)
++gpu->intensity;