Changed `get_default_aggregation` to `get_aggregation`

lm_eval/api/task.py

@@ -33,7 +33,6 @@ from lm_eval.api.metrics import (
 from lm_eval.api.registry import (
     get_metric,
     get_aggregation,
-    get_default_aggregation,
     is_higher_better,
     DEFAULT_METRIC_REGISTRY,
     OUTPUT_TYPE_REGISTRY,
@@ -543,9 +542,7 @@ class ConfigurableTask(Task):
             # TODO: handle this in TaskConfig.__post_init__ ?
             for metric_name in _metric_list:
                 self._metric_fn_list[metric_name] = get_metric(metric_name)
-                self._aggregation_list[metric_name] = get_default_aggregation(
-                    metric_name
-                )
+                self._aggregation_list[metric_name] = get_aggregation(metric_name)
                 self._higher_is_better[metric_name] = is_higher_better(metric_name)
         else:
             for metric_config in self.config.metric_list: