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

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

        Returns:
             This AbstractProgram.
        """
        for key in keys:
            del self._labels[key]
        return self
Removes labels with given keys from the labels of a previously
        created quantum program.

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

        Returns:
             This AbstractProgram.
        
cirq-google/cirq_google/engine/abstract_local_program.py