Created by: MartijnCuppens
We needed this, back in the days when this was still present in our code (see https://github.com/twbs/bootstrap/issues/4666): https://github.com/twbs/bootstrap/blob/fd49d4a44f7fe73054b861461b9ec0f36a1bb29a/less/forms.less#L102-L108
But nowadays it's redundant.