Remove config validation in update status hook

[chanchiwai-ray]

The config validation does not make sense in update status hook because the config options will not change on update status, and the same validation is already done in config changed hook.

[chanchiwai-ray]

Abandon! Now I remember why we are adding config validation in update_status, because if the config is incorrect during config_changed, then the blocked status will be washed away after next update_status if we don't do the config validation again.

[dashmage]

It's a good thing you figured this out, I didn't remember it either. It would be nice if we had a comment explaining this so we don't end up trying to remove it again.