greybus: es2: remove #if 0 code

These functions were never used, and we are about to remove the
structures it was trying to reference, so let's remove it to get it out
of the way.
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/es2.c

@@ -208,65 +208,6 @@ static int cport_to_ep_pair(struct es2_ap_dev *es2, u16 cport_id)
 	return es2->cport_to_ep[cport_id];
 }
 
-/* Disable for now until we work all of this out to keep a warning-free build */
-#if 0
-/* Test if the endpoints pair is already mapped to a cport */
-static int ep_pair_in_use(struct es2_ap_dev *es2, int ep_pair)
-{
-	int i;
-
-	for (i = 0; i < es2->hd->num_cports; i++) {
-		if (es2->cport_to_ep[i] == ep_pair)
-			return 1;
-	}
-	return 0;
-}
-
-/* Configure the endpoint mapping and send the request to APBridge */
-static int map_cport_to_ep(struct es2_ap_dev *es2,
-				u16 cport_id, int ep_pair)
-{
-	int retval;
-	struct cport_to_ep *cport_to_ep;
-
-	if (ep_pair < 0 || ep_pair >= NUM_BULKS)
-		return -EINVAL;
-	if (cport_id >= es2->hd->num_cports)
-		return -EINVAL;
-	if (ep_pair && ep_pair_in_use(es2, ep_pair))
-		return -EINVAL;
-
-	cport_to_ep = kmalloc(sizeof(*cport_to_ep), GFP_KERNEL);
-	if (!cport_to_ep)
-		return -ENOMEM;
-
-	es2->cport_to_ep[cport_id] = ep_pair;
-	cport_to_ep->cport_id = cpu_to_le16(cport_id);
-	cport_to_ep->endpoint_in = es2->cport_in[ep_pair].endpoint;
-	cport_to_ep->endpoint_out = es2->cport_out[ep_pair].endpoint;
-
-	retval = usb_control_msg(es2->usb_dev,
-				 usb_sndctrlpipe(es2->usb_dev, 0),
-				 GB_APB_REQUEST_EP_MAPPING,
-				 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_INTERFACE,
-				 0x00, 0x00,
-				 (char *)cport_to_ep,
-				 sizeof(*cport_to_ep),
-				 ES2_USB_CTRL_TIMEOUT);
-	if (retval == sizeof(*cport_to_ep))
-		retval = 0;
-	kfree(cport_to_ep);
-
-	return retval;
-}
-
-/* Unmap a cport: use the muxed endpoints pair */
-static int unmap_cport(struct es2_ap_dev *es2, u16 cport_id)
-{
-	return map_cport_to_ep(es2, cport_id, 0);
-}
-#endif
-
 static int output_sync(struct es2_ap_dev *es2, void *req, u16 size, u8 cmd)
 {
 	struct usb_device *udev = es2->usb_dev;