ASoC: rt5645: Remove the unused variable

The patch is for removing the unused variable.
Signed-off-by: NOder Chiou <oder_chiou@realtek.com>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/codecs/rt5645.c

@@ -1166,7 +1166,6 @@ static int rt5645_spk_event(struct snd_soc_dapm_widget *w,
 	struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_codec *codec = w->codec;
-	struct rt5645_priv *rt5645 = snd_soc_codec_get_drvdata(codec);
 
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU: