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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def delete_multifactor(self, id, provider):
 """Delete a user's multifactor provider. Args: id (str):
 The user's id. provider (str):
 The multifactor provider. Supported values 'duo' or 'google-authenticator' See: https://auth0.com/docs/api/management/v2#!/Users/delete_multifactor_by_provider """

        url = self._url('{}/multifactor/{}'.format(id, provider))
        return self.client.delete(url)