ALSA: hda: Remove unused MAX_PIN_CONFIGS constant

Since it was introduced around v2.6.30 it was never used. Also HDA
specification does not mention any limitation on number of PIN
configurations.
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>
Link: https://lore.kernel.org/r/20220818141517.109280-4-amadeuszx.slawinski@linux.intel.comSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/hda_sysfs.c

@@ -375,8 +375,6 @@ static ssize_t user_pin_configs_show(struct device *dev,
 	return pin_configs_show(codec, &codec->user_pins, buf);
 }
 
-#define MAX_PIN_CONFIGS		32
-
 static int parse_user_pin_configs(struct hda_codec *codec, const char *buf)
 {
 	int nid, cfg, err;