Remove unused header include.
diff --git a/device-gpu.c b/device-gpu.c
index a74c51a..18f0542 100644
--- a/device-gpu.c
+++ b/device-gpu.c
@@ -27,7 +27,6 @@
#include "miner.h"
#include "device-cpu.h"
#include "findnonce.h"
-#include "util.h"
#include "ocl.h"
#include "adl.h"