Remove unused tdiff value.
diff --git a/driver-bitforce.c b/driver-bitforce.c
index bc5181c..56d3ff6 100644
--- a/driver-bitforce.c
+++ b/driver-bitforce.c
@@ -213,9 +213,6 @@ static uint64_t bitforce_scanhash(struct thr_info *thr, struct work *work, uint6
i += 1000;
/* Now start looking for results. Stupid polling every 10ms... */
- tdiff.tv_sec = 0;
- tdiff.tv_usec = 10000;
-
work_restart[thr_id].restart = 0;
while (42) {
if (unlikely(work_restart[thr_id].restart))