F_CLOCK changed to F_USB to be more descriptive, and applicable on future architecture ports.

LUFA/Drivers/USB/Core/HostStandardReq.c

@@ -38,7 +38,6 @@
 
 uint8_t USB_Host_SendControlRequest(void* const BufferPtr)
 {
-	uint8_t* HeaderStream = (uint8_t*)&USB_ControlRequest;
 	uint8_t* DataStream   = (uint8_t*)BufferPtr;
 	bool     BusSuspended = USB_Host_IsBusSuspended();
 	uint8_t  ReturnStatus = HOST_SENDCONTROL_Successful;