ASoC: wm8993: drop regulator_bulk_free of devm_ allocated data

It's not necessary to free regulator consumers allocated with
devm_regulator_bulk_get.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/wm8993.c

@@ -1562,7 +1562,6 @@ static int wm8993_remove(struct snd_soc_codec *codec)
 	struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
 
 	wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
-	regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
 	return 0;
 }