ASoC: ak4642: Cleanup manual bias level transitions

Since the ASoC core now takes care of setting the bias level to
SND_SOC_BIAS_OFF when removing the CODEC there is no need to do it manually
anymore either.

The manual transition to SND_SOC_BIAS_STANDBY at the end of CODEC probe()
can also be removed as the core will automatically do this after the CODEC
has been probed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ak4642.c

@@ -491,23 +491,7 @@ static int ak4642_resume(struct snd_soc_codec *codec)
 	return 0;
 }
 
-
-static int ak4642_probe(struct snd_soc_codec *codec)
-{
-	ak4642_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-
-	return 0;
-}
-
-static int ak4642_remove(struct snd_soc_codec *codec)
-{
-	ak4642_set_bias_level(codec, SND_SOC_BIAS_OFF);
-	return 0;
-}
-
 static struct snd_soc_codec_driver soc_codec_dev_ak4642 = {
-	.probe			= ak4642_probe,
-	.remove			= ak4642_remove,
 	.resume			= ak4642_resume,
 	.set_bias_level		= ak4642_set_bias_level,
 	.controls		= ak4642_snd_controls,