Remove default unit of measurement in IHC sensors (#93054)

Remove sensor default unit of measurement

homeassistant/components/ihc/manual_setup.py

@@ -12,7 +12,6 @@ from homeassistant.const import (
     CONF_UNIT_OF_MEASUREMENT,
     CONF_URL,
     CONF_USERNAME,
-    UnitOfTemperature,
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import discovery
@@ -81,11 +80,7 @@ LIGHT_SCHEMA = DEVICE_SCHEMA.extend(
 )
 
 SENSOR_SCHEMA = DEVICE_SCHEMA.extend(
-    {
-        vol.Optional(
-            CONF_UNIT_OF_MEASUREMENT, default=UnitOfTemperature.CELSIUS
-        ): cv.string
-    }
+    {vol.Optional(CONF_UNIT_OF_MEASUREMENT): cv.string}
 )
 
 IHC_SCHEMA = vol.Schema(