removing unused libusb_context pointer
diff --git a/cgminer.c b/cgminer.c
index dab1af5..f946741 100644
--- a/cgminer.c
+++ b/cgminer.c
@@ -4421,9 +4421,6 @@ int main(int argc, char *argv[])
struct thr_info *thr;
unsigned int k;
int i, j;
-#ifdef HAVE_LIBUSB
- struct libusb_context *context;
-#endif
/* This dangerous functions tramples random dynamically allocated
* variables so do it before anything at all */