[sen5x] Remove incorrect AQI device class from VOC and NOx Index sensors (#16463)

esphome/components/sen5x/sensor.py

@@ -25,7 +25,6 @@ from esphome.const import (
     CONF_TEMPERATURE_COMPENSATION,
     CONF_TIME_CONSTANT,
     CONF_VOC,
-    DEVICE_CLASS_AQI,
     DEVICE_CLASS_HUMIDITY,
     DEVICE_CLASS_PM1,
     DEVICE_CLASS_PM10,
@@ -77,7 +76,6 @@ def _gas_sensor(
     return sensor.sensor_schema(
         icon=ICON_RADIATOR,
         accuracy_decimals=0,
-        device_class=DEVICE_CLASS_AQI,
         state_class=STATE_CLASS_MEASUREMENT,
     ).extend(
         {