On_command_type error

I keep getting this error all the time but i can not find this command anywhere in my installation.
2019-03-04

I think it is related to some mqtt switch nut i only have 2 sonoff mqtt switches in my config, i did remove them but the message is still there.
What else could it be?

This is in the log file:

2019-03-04 19:59:09 WARNING (MainThread) [homeassistant.helpers.config_validation] Your configuration contains extra keys that the platform does not support.
Please remove [on_command_type].