ASoC: max9850: remove unused variable 'max9850_reg'

sound/soc/codecs/max9850.c:31:33: warning:
 max9850_reg defined but not used [-Wunused-const-variable=]

It is not used since commit 06841662 ("ASoC:
max9850: Convert to direct regmap API usage")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190808143507.66788-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/max9850.c

@@ -27,19 +27,6 @@ struct max9850_priv {
 	unsigned int sysclk;
 };
 
-/* max9850 register cache */
-static const struct reg_default max9850_reg[] = {
-	{  2, 0x0c },
-	{  3, 0x00 },
-	{  4, 0x00 },
-	{  5, 0x00 },
-	{  6, 0x00 },
-	{  7, 0x00 },
-	{  8, 0x00 },
-	{  9, 0x00 },
-	{ 10, 0x00 },
-};
-
 /* these registers are not used at the moment but provided for the sake of
  * completeness */
 static bool max9850_volatile_register(struct device *dev, unsigned int reg)