ASoC: cs42l51: Remove unused variable

‘cs42l51’ is not used. Remove it.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/cs42l51.c

@@ -487,7 +487,6 @@ static struct snd_soc_dai_driver cs42l51_dai = {
 
 static int cs42l51_probe(struct snd_soc_codec *codec)
 {
-	struct cs42l51_private *cs42l51 = snd_soc_codec_get_drvdata(codec);
 	int ret, reg;
 
 	ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);