usb-device: Remove 0x0421/0x3f00 from list

It was some internal Nokia development board with just temporary device id. Not a real RX-34 device.

src/usb-device.c

@@ -59,7 +59,6 @@ static struct usb_flash_device usb_devices[] = {
 	{ 0x0421, 0x0518, -1, -1, -1, FLASH_DISK, { DEVICE_RM_696, 0 } },
 	{ 0x0421, 0x0519, -1, -1, -1, FLASH_UNKN, { DEVICE_RM_696, 0 } }, /* RNDIS/Ethernet mode */
 	{ 0x0421, 0x051a,  2,  1, -1, FLASH_UNKN, { DEVICE_RM_696, 0 } }, /* Sync mode (ADL protocol) */
-	{ 0x0421, 0x3f00,  2,  1, -1, FLASH_NOLO, { DEVICE_RX_34, 0 } },
 };
 
 static const char * usb_flash_protocols[] = {