fix: remove datasets value

valid_efficiency_score.py

@@ -75,8 +75,6 @@ class ValidEfficiencyScore(evaluate.Metric):
             features=datasets.Features({
                 'predictions': datasets.Value('string'),
                 'references': datasets.Value('string'),
-                'execute': datasets.Value('function'),
-                'filter_func': datasets.Value('function'),
             }),
             # Homepage of the module for documentation
             homepage="http://module.homepage",