All sn95031 stuff was removed in commit 
987da3fe1759 ("ASoC: sn95031: remove this code")
Since SND_SOC_SN95031 was gone, remove makefile about it.
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
 obj-$(CONFIG_SND_SOC_SIGMADSP_I2C)     += snd-soc-sigmadsp-i2c.o
 obj-$(CONFIG_SND_SOC_SIGMADSP_REGMAP)  += snd-soc-sigmadsp-regmap.o
 obj-$(CONFIG_SND_SOC_SI476X)   += snd-soc-si476x.o
-obj-$(CONFIG_SND_SOC_SN95031)  +=snd-soc-sn95031.o
 obj-$(CONFIG_SND_SOC_SPDIF)    += snd-soc-spdif-rx.o snd-soc-spdif-tx.o
 obj-$(CONFIG_SND_SOC_SIRF_AUDIO_CODEC) += sirf-audio-codec.o
 obj-$(CONFIG_SND_SOC_SSM2518)  += snd-soc-ssm2518.o