def remove_labels(self, keys: list[str]) -> AbstractJob:
        """Removes labels with given keys from the labels of a previously
        created quantum job.

        Params:
            label_keys: Label keys to remove from the existing job labels.

        Returns:
            This AbstractJob.
        """
        self._update_time = datetime.datetime.now()
        for key in keys:
            del self._labels[key]
        return self
Removes labels with given keys from the labels of a previously
        created quantum job.

        Params:
            label_keys: Label keys to remove from the existing job labels.

        Returns:
            This AbstractJob.
        
cirq-google/cirq_google/engine/abstract_local_job.py