Staging: lirc: remove unneeded variable

We never use control_req so I removed it.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/lirc/lirc_imon.c

@@ -320,7 +320,6 @@ static int send_packet(struct imon_context *context)
 	unsigned int pipe;
 	int interval = 0;
 	int retval = 0;
-	struct usb_ctrlrequest *control_req = NULL;
 
 	/* Check if we need to use control or interrupt urb */
 	pipe = usb_sndintpipe(context->usbdev,
@@ -355,8 +354,6 @@ static int send_packet(struct imon_context *context)
 			err("%s: packet tx failed (%d)", __func__, retval);
 	}
 
-	kfree(control_req);
-
 	return retval;
 }