iiod: responder: drop useless iio_context_get_device()

In handle_free_buffer(), we get the device and then never use it.
Moreover, the same is being done in the call to get_iio_buffer() so that
there's really no point for it.

Signed-off-by: Nuno Sa <noname.nuno@gmail.com>

Author: nunojsa

iiod/responder.c

@@ -553,15 +553,10 @@ static void handle_free_buffer(struct parser_pdata *pdata,
 			       struct iiod_command_data *cmd_data)
 {
 	struct iiod_io *io = iiod_command_get_default_io(cmd_data);
-	const struct iio_device *dev;
 	struct buffer_entry *entry, *buf_entry;
 	struct iio_buffer *buf;
 	int ret = -ENODEV;
 
-	dev = iio_context_get_device(pdata->ctx, cmd->dev);
-	if (!dev)
-		goto out_send_response;
-
 	buf = get_iio_buffer(pdata, cmd, &buf_entry);
 	ret = iio_err(buf);
 	if (ret)