usb/gadget: (fusb300_udc) Remove unused function fusb300_ep0_complete

fusb300_ep0_complete() is an empty function, not called from anywhere,
and causes the following build warning.

fusb300_udc.c:983: warning: fusb300_ep0_complete defined but not used

Remove it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index 763d462..b82a114 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -980,11 +980,6 @@
 		} \
 	} while (0)
 
-static void fusb300_ep0_complete(struct usb_ep *ep,
-				struct usb_request *req)
-{
-}
-
 static int setup_packet(struct fusb300 *fusb300, struct usb_ctrlrequest *ctrl)
 {
 	u8 *p = (u8 *)ctrl;