ASoC: ak4641: Remove unused codec field from struct ak4641_priv

Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NLiam Girdwood <lrg@ti.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/ak4641.c

@@ -31,7 +31,6 @@
 
 /* codec private data */
 struct ak4641_priv {
-	struct snd_soc_codec *codec;
 	unsigned int sysclk;
 	int deemph;
 	int playback_fs;