Removes the object from given database. Usage::

            item = Item.get_one(db)
            item.remove(db)

        Collection name is taken from :attr:`MongoBoundDictMixin.collection`.

def remove(self, db):
        """
        Removes the object from given database. Usage::

            item = Item.get_one(db)
            item.remove(db)

        Collection name is taken from :attr:`MongoBoundDictMixin.collection`.
        """
        assert self.collection
        assert self.id

        db[self.collection].remove(self.id)