But in my case, I just want to remove it from displaying. And if you want it too. This is my solution (thought a little bit ugly):
put it in initializers/override_human_attribute_name.rb
And restart the rails server.
By the way, in in Ruby Forum. There is a solution that override human_attribute_name too with a custom mapping HUMANIZED_COLUMNS hash. But the solution doesn't work straightly. It's because in ActiveModel::Errors have it's own count method. Which need some calculate in human_attribute_name. And if you don't provide it in your override. It will fail on calling model_instance.errors.count
That's why i call super before returning empty string. Maybe you got better solution. Welcome provide in follow. I will appreciate your sharing!