ASoC: ak4671: 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/ak4671.c

@@ -611,20 +611,7 @@ static struct snd_soc_dai_driver ak4671_dai = {
 	.ops = &ak4671_dai_ops,
 };
 
-static int ak4671_probe(struct snd_soc_codec *codec)
-{
-	return ak4671_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
-}
-
-static int ak4671_remove(struct snd_soc_codec *codec)
-{
-	ak4671_set_bias_level(codec, SND_SOC_BIAS_OFF);
-	return 0;
-}
-
 static struct snd_soc_codec_driver soc_codec_dev_ak4671 = {
-	.probe = ak4671_probe,
-	.remove = ak4671_remove,
 	.set_bias_level = ak4671_set_bias_level,
 	.controls = ak4671_snd_controls,
 	.num_controls = ARRAY_SIZE(ak4671_snd_controls),