modify mmlu tasks

lm_eval/tasks/mmlu/default/_mmlu_stem.yaml

+group: mmlu_stem
+task:
+  - abstract_algebra
+  - anatomy
+  - astronomy
+  - college_biology
+  - college_chemistry
+  - college_computer_science
+  - college_mathematics
+  - college_physics
+  - computer_security
+  - conceptual_physics
+  - electrical_engineering
+  - elementary_mathematics
+  - high_school_biology
+  - high_school_chemistry
+  - high_school_computer_science
+  - high_school_mathematics
+  - high_school_physics
+  - high_school_statistics
+  - machine_learning
+group_config:
+  aggregate_metric: True
+  weight_by_size: True

lm_eval/tasks/mmlu/default/mmlu.yaml

+group: mmlu
+task:
+- mmlu_stem
+- mmlu_other
+- mmlu_social_sciences
+- mmlu_humanities

lm_eval/tasks/mmlu/default/mmlu_abstract_algebra.yaml

 "dataset_name": "abstract_algebra"
 "description": "The following are multiple choice questions (with answers) about abstract\
   \ algebra.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_abstract_algebra"
-"task_alias": "abstract_algebra"
+"task_alias": "abstract algebra"

lm_eval/tasks/mmlu/default/mmlu_anatomy.yaml

 "dataset_name": "anatomy"
 "description": "The following are multiple choice questions (with answers) about anatomy.\n\
   \n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_anatomy"
 "task_alias": "anatomy"

lm_eval/tasks/mmlu/default/mmlu_astronomy.yaml

 "dataset_name": "astronomy"
 "description": "The following are multiple choice questions (with answers) about astronomy.\n\
   \n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_astronomy"
 "task_alias": "astronomy"

lm_eval/tasks/mmlu/default/mmlu_business_ethics.yaml

 "dataset_name": "business_ethics"
 "description": "The following are multiple choice questions (with answers) about business\
   \ ethics.\n\n"
-"group": "mmlu_other"
-"group_alias": "other"
 "include": "_default_template_yaml"
 "task": "mmlu_business_ethics"
-"task_alias": "business_ethics"
+"task_alias": "business ethics"

lm_eval/tasks/mmlu/default/mmlu_clinical_knowledge.yaml

 "dataset_name": "clinical_knowledge"
 "description": "The following are multiple choice questions (with answers) about clinical\
   \ knowledge.\n\n"
-"group": "mmlu_other"
-"group_alias": "other"
 "include": "_default_template_yaml"
 "task": "mmlu_clinical_knowledge"
-"task_alias": "clinical_knowledge"
+"task_alias": "clinical knowledge"

lm_eval/tasks/mmlu/default/mmlu_college_biology.yaml

 "dataset_name": "college_biology"
 "description": "The following are multiple choice questions (with answers) about college\
   \ biology.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_college_biology"
-"task_alias": "college_biology"
+"task_alias": "college biology"

lm_eval/tasks/mmlu/default/mmlu_college_chemistry.yaml

 "dataset_name": "college_chemistry"
 "description": "The following are multiple choice questions (with answers) about college\
   \ chemistry.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_college_chemistry"
-"task_alias": "college_chemistry"
+"task_alias": "college chemistry"

lm_eval/tasks/mmlu/default/mmlu_college_computer_science.yaml

 "dataset_name": "college_computer_science"
 "description": "The following are multiple choice questions (with answers) about college\
   \ computer science.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_college_computer_science"
-"task_alias": "college_computer_science"
+"task_alias": "college computer science"

lm_eval/tasks/mmlu/default/mmlu_college_mathematics.yaml

 "dataset_name": "college_mathematics"
 "description": "The following are multiple choice questions (with answers) about college\
   \ mathematics.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_college_mathematics"
-"task_alias": "college_mathematics"
+"task_alias": "college mathematics"

lm_eval/tasks/mmlu/default/mmlu_college_medicine.yaml

 "dataset_name": "college_medicine"
 "description": "The following are multiple choice questions (with answers) about college\
   \ medicine.\n\n"
-"group": "mmlu_other"
-"group_alias": "other"
 "include": "_default_template_yaml"
 "task": "mmlu_college_medicine"
-"task_alias": "college_medicine"
+"task_alias": "college medicine"

lm_eval/tasks/mmlu/default/mmlu_college_physics.yaml

 "dataset_name": "college_physics"
 "description": "The following are multiple choice questions (with answers) about college\
   \ physics.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_college_physics"
-"task_alias": "college_physics"
+"task_alias": "college physics"

lm_eval/tasks/mmlu/default/mmlu_computer_security.yaml

 "dataset_name": "computer_security"
 "description": "The following are multiple choice questions (with answers) about computer\
   \ security.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_computer_security"
-"task_alias": "computer_security"
+"task_alias": "computer security"

lm_eval/tasks/mmlu/default/mmlu_conceptual_physics.yaml

 "dataset_name": "conceptual_physics"
 "description": "The following are multiple choice questions (with answers) about conceptual\
   \ physics.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_conceptual_physics"
-"task_alias": "conceptual_physics"
+"task_alias": "conceptual physics"

lm_eval/tasks/mmlu/default/mmlu_econometrics.yaml

 "dataset_name": "econometrics"
 "description": "The following are multiple choice questions (with answers) about econometrics.\n\
   \n"
-"group": "mmlu_social_sciences"
-"group_alias": "social_sciences"
 "include": "_default_template_yaml"
 "task": "mmlu_econometrics"
 "task_alias": "econometrics"

lm_eval/tasks/mmlu/default/mmlu_electrical_engineering.yaml

 "dataset_name": "electrical_engineering"
 "description": "The following are multiple choice questions (with answers) about electrical\
   \ engineering.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_electrical_engineering"
-"task_alias": "electrical_engineering"
+"task_alias": "electrical engineering"

lm_eval/tasks/mmlu/default/mmlu_elementary_mathematics.yaml

 "dataset_name": "elementary_mathematics"
 "description": "The following are multiple choice questions (with answers) about elementary\
   \ mathematics.\n\n"
-"group": "mmlu_stem"
-"group_alias": "stem"
 "include": "_default_template_yaml"
 "task": "mmlu_elementary_mathematics"
-"task_alias": "elementary_mathematics"
+"task_alias": "elementary mathematics"

lm_eval/tasks/mmlu/default/mmlu_formal_logic.yaml

 "dataset_name": "formal_logic"
 "description": "The following are multiple choice questions (with answers) about formal\
   \ logic.\n\n"
-"group": "mmlu_humanities"
-"group_alias": "humanities"
 "include": "_default_template_yaml"
 "task": "mmlu_formal_logic"
-"task_alias": "formal_logic"
+"task_alias": "formal logic"

lm_eval/tasks/mmlu/default/mmlu_global_facts.yaml

 "dataset_name": "global_facts"
 "description": "The following are multiple choice questions (with answers) about global\
   \ facts.\n\n"
-"group": "mmlu_other"
-"group_alias": "other"
 "include": "_default_template_yaml"
 "task": "mmlu_global_facts"
-"task_alias": "global_facts"
+"task_alias": "global facts"