ASoC: wm8350: remove snd_soc_codec

codec is replace to component.
It seems no-one is using it, Let's remove it.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

include/linux/mfd/wm8350/audio.h

@@ -617,11 +617,8 @@ struct wm8350_audio_platform_data {
 	u32 codec_current_charge:2;	/* codec current @ vmid charge */
 };
 
-struct snd_soc_codec;
-
 struct wm8350_codec {
 	struct platform_device *pdev;
-	struct snd_soc_codec *codec;
 	struct wm8350_audio_platform_data *platform_data;
 };