Set the default upgrade icon for the MQTT device to the default icon for Home Assistant instead of the icon for the MQTT integration

homeassistant/components/mqtt/update.py

@@ -105,10 +105,7 @@ class MqttUpdate(MqttEntity, UpdateEntity, RestoreEntity):
     @property
     def entity_picture(self) -> str | None:
         """Return the entity picture to use in the frontend."""
-        if self._attr_entity_picture is not None:
-            return self._attr_entity_picture
-
-        return super().entity_picture
+        return self._attr_entity_picture
 
     @staticmethod
     def config_schema() -> VolSchemaType:

tests/components/mqtt/test_update.py

@@ -211,10 +211,7 @@ async def test_value_template(
     assert state.state == STATE_OFF
     assert state.attributes.get("installed_version") == "1.9.0"
     assert state.attributes.get("latest_version") == "1.9.0"
-    assert (
-        state.attributes.get("entity_picture")
-        == "https://brands.home-assistant.io/_/mqtt/icon.png"
-    )
+    assert state.attributes.get("entity_picture") is None
 
     async_fire_mqtt_message(hass, latest_version_topic, '{"latest":"2.0.0"}')