0.90 Config Warning but can't find them

I’m getting this config warning in my notifications.

From the log: (can’t copy the notification)
2019-03-20 18:27:15 WARNING (MainThread) [homeassistant.helpers.config_validation] Your configuration contains extra keys that the platform does not support.
Please remove [brightness_command_topic], [brightness_state_topic], [brightness_scale], [on_command_type], [brightness_value_template], [rgb_command_topic], [rgb_state_topic], [rgb_value_template], [color_temp_command_topic], [color_temp_state_topic], [color_temp_value_template].

I cannot find these in my yaml files. How do I track them down? i.e. what component or entity is causing them?

thanks

Looks like an MQTT light

It turned out to be OLD retained message in mosquitto.
As soon as I deleted the mosquitto database and restarted both mosquitto and home assistant the
error messages went away.