Ensure the generic schema, remove `types`

        :return: Gives back the schema
        :rtype: dict

def get_jsonschema(self, context=None):
        """Ensure the generic schema, remove `types`

        :return: Gives back the schema
        :rtype: dict
        """
        schema = super(Enum, self).get_jsonschema(context=None)
        schema.pop('type')
        if self.get_attr('enum'):
            schema['enum'] = self.get_attr('enum')
        return schema