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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 remove(self):
 """ Removes the subscription. """

        self.logger.debug('Remove subscription from server...')

        data = {
            'command': 'unsubscribe',
            'identifier': self._identifier_string()
        }

        self.connection.send(data)
        self.state = 'unsubscribed'