ASoC: rt5645: Remove unused rt5645 variable

"ASoC: rt5645: Simplify rt5645_enable_push_button_irq" removes
the test that accessed rt5645->pdata.jd_mode (that test is now
done in rt5645_jack_detect only), so we do not need that
variable anymore.
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt5645.c

@@ -2763,7 +2763,6 @@ static void rt5645_enable_push_button_irq(struct snd_soc_codec *codec,
 	bool enable)
 {
 	struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
-	struct rt5645_priv *rt5645 = snd_soc_codec_get_drvdata(codec);
 
 	if (enable) {
 		snd_soc_dapm_force_enable_pin(dapm, "ADC L power");