Remove unused variables

src/classic.c

@@ -51,7 +51,6 @@ static void classic_ctrl_pressed_buttons(struct classic_ctrl_t* cc, short now);
  */
 #define HANDSHAKE_BYTES_USED 12
 int classic_ctrl_handshake(struct wiimote_t* wm, struct classic_ctrl_t* cc, byte* data, unsigned short len) {
-	int i;
 
 	cc->btns = 0;
 	cc->btns_held = 0;

src/guitar_hero_3.c

@@ -51,7 +51,6 @@ static void guitar_hero_3_pressed_buttons(struct guitar_hero_3_t* gh3, short now
  *	@return	Returns 1 if handshake was successful, 0 if not.
  */
 int guitar_hero_3_handshake(struct wiimote_t* wm, struct guitar_hero_3_t* gh3, byte* data, unsigned short len) {
-	int i;
 
 	/*
 	 *	The good fellows that made the Guitar Hero 3 controller

src/nunchuk.c

@@ -50,8 +50,6 @@
  */
 #define HANDSHAKE_BYTES_USED 14
 int nunchuk_handshake(struct wiimote_t* wm, struct nunchuk_t* nc, byte* data, unsigned short len) {
-	int i;
-
 	nc->btns = 0;
 	nc->btns_held = 0;
 	nc->btns_released = 0;
@@ -132,7 +130,6 @@ void nunchuk_disconnected(struct nunchuk_t* nc) {
  *	@param msg		The message specified in the event packet.
  */
 void nunchuk_event(struct nunchuk_t* nc, byte* msg) {
-	int i;
 
 	/* get button states */
 	nunchuk_pressed_buttons(nc, msg[5]);