'Remove Nick with matching category.
Args:
key (str): A key for the nick to match for.
category (str, optional): the category within which to
removethe nick. The "inputline" means replacing data
sent by the user.
kwargs (any, optional): These are passed on to `AttributeHandler.get`.'

def remove(self, key, category='inputline', **kwargs):

    super(NickHandler, self).remove(key, category=category, **kwargs)
