Remove an exploration technique from a list of active techniques.

        :param tech:    An ExplorationTechnique object.
        :type tech:     ExplorationTechnique

def remove_technique(self, tech):
        """
        Remove an exploration technique from a list of active techniques.

        :param tech:    An ExplorationTechnique object.
        :type tech:     ExplorationTechnique
        """
        if not isinstance(tech, ExplorationTechnique):
            raise SimulationManagerError

        def _is_overriden(name):
            return getattr(tech, name).__code__ is not getattr(ExplorationTechnique, name).__code__

        overriden = filter(_is_overriden, ('step', 'filter', 'selector', 'step_state', 'successors'))
        hooks = {name: getattr(tech, name) for name in overriden}
        HookSet.remove_hooks(self, **hooks)

        self._techniques.remove(tech)
        return tech