ASoC: rt1011: remove unused variable 'dac_vol_tlv' and 'adc_vol_tlv'

sound/soc/codecs/rt1011.c:981:35: warning:
 dac_vol_tlv defined but not used [-Wunused-const-variable=]
sound/soc/codecs/rt1011.c:982:35: warning:
 adc_vol_tlv defined but not used [-Wunused-const-variable=]

They are never used, so can be removed.
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190815090602.9000-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt1011.c

@@ -978,9 +978,6 @@ static bool rt1011_readable_register(struct device *dev, unsigned int reg)
 	}
 }
 
-static const DECLARE_TLV_DB_SCALE(dac_vol_tlv, -9435, 37, 0);
-static const DECLARE_TLV_DB_SCALE(adc_vol_tlv, -1739, 37, 0);
-
 static const char * const rt1011_din_source_select[] = {
 	"Left",
 	"Right",