ASoC: codecs: wm0010: remove unused struct 'wm0010_spi_msg'

'wm0010_spi_msg' has been unused since the original
commit e3523e01 ("ASoC: wm0010: Add initial wm0010 DSP driver").

Remove it.
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://msgid.link/r/20240601225446.183505-3-linux@treblig.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm0010.c

@@ -115,14 +115,6 @@ struct wm0010_priv {
 	struct completion boot_completion;
 };
 
-struct wm0010_spi_msg {
-	struct spi_message m;
-	struct spi_transfer t;
-	u8 *tx_buf;
-	u8 *rx_buf;
-	size_t len;
-};
-
 static const struct snd_soc_dapm_widget wm0010_dapm_widgets[] = {
 SND_SOC_DAPM_SUPPLY("CLKIN",  SND_SOC_NOPM, 0, 0, NULL, 0),
 };