Delete lm_eval/tasks/siqa/bigbench.yaml

lm_eval/tasks/siqa/bigbench.yaml

-task: social_iqa
-dataset_path: social_i_qa
-dataset_name: null
-output_type: multiple_choice
-training_split: train
-validation_split: validation
-doc_to_text: "Q: {{context}} {{question}}\nA:"
-target_delimiter: " "
-doc_to_choice: ["{{answerA}}", "{{answerB}}", "{{answerC}}"]
-doc_to_target: "{{label}}"
-metric_list:
-  - metric: acc
-    aggregation: mean
-    higher_is_better: true
-metadata:
-  - version: 0.0