@classmethod
    def unregister(cls, step_class):
        """Unregisters a :class:`~horizon.workflows.Step` from the workflow.
        """
        try:
            cls._cls_registry.remove(step_class)
        except __HOLE__:
            raise base.NotRegistered('%s is not registered' % cls)
        return cls._unregister(step_class)
dataset/ETHPy150Open Havate/havate-openstack/proto-build/gui/horizon/Horizon_GUI/horizon/workflows/base.py/Workflow.unregister