ASoC: max98090: remove unused constant variables

Fix warnings with W=1

If these variables are useful then this driver should be modified to
expose them.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/max98090.c

@@ -314,9 +314,6 @@ static const DECLARE_TLV_DB_SCALE(max98090_av_tlv, -1200, 100, 0);
 static const DECLARE_TLV_DB_SCALE(max98090_dvg_tlv, 0, 600, 0);
 static const DECLARE_TLV_DB_SCALE(max98090_dv_tlv, -1500, 100, 0);
 
-static const DECLARE_TLV_DB_SCALE(max98090_sidetone_tlv, -6050, 200, 0);
-
-static const DECLARE_TLV_DB_SCALE(max98090_alc_tlv, -1500, 100, 0);
 static const DECLARE_TLV_DB_SCALE(max98090_alcmakeup_tlv, 0, 100, 0);
 static const DECLARE_TLV_DB_SCALE(max98090_alccomp_tlv, -3100, 100, 0);
 static const DECLARE_TLV_DB_SCALE(max98090_drcexp_tlv, -6600, 100, 0);
@@ -817,18 +814,6 @@ static SOC_ENUM_SINGLE_VIRT_DECL(dmic_mux_enum, dmic_mux_text);
 static const struct snd_kcontrol_new max98090_dmic_mux =
 	SOC_DAPM_ENUM("DMIC Mux", dmic_mux_enum);
 
-static const char *max98090_micpre_text[] = { "Off", "On" };
-
-static SOC_ENUM_SINGLE_DECL(max98090_pa1en_enum,
-			    M98090_REG_MIC1_INPUT_LEVEL,
-			    M98090_MIC_PA1EN_SHIFT,
-			    max98090_micpre_text);
-
-static SOC_ENUM_SINGLE_DECL(max98090_pa2en_enum,
-			    M98090_REG_MIC2_INPUT_LEVEL,
-			    M98090_MIC_PA2EN_SHIFT,
-			    max98090_micpre_text);
-
 /* LINEA mixer switch */
 static const struct snd_kcontrol_new max98090_linea_mixer_controls[] = {
 	SOC_DAPM_SINGLE("IN1 Switch", M98090_REG_LINE_INPUT_CONFIG,