diff --git a/scenarionet/scripts/combine_dataset.py b/scenarionet/scripts/combine_dataset.py
index edb1ed6..63def34 100644
--- a/scenarionet/scripts/combine_dataset.py
+++ b/scenarionet/scripts/combine_dataset.py
@@ -1,13 +1,5 @@
-"""
-This script aims to convert nuscenes scenarios to ScenarioDescription, so that we can load any nuscenes scenarios into
-MetaDrive.
-"""
 import argparse
-import os.path
 
-from scenarionet import SCENARIONET_DATASET_PATH
-from scenarionet.converter.nuscenes.utils import convert_nuscenes_scenario, get_nuscenes_scenarios
-from scenarionet.converter.utils import write_to_directory
 from scenarionet.builder.utils import combine_multiple_dataset
 
 if __name__ == '__main__':
diff --git a/scenarionet/scripts/convert_nuplan.py b/scenarionet/scripts/convert_nuplan.py
index 9a280b4..3b081fd 100644
--- a/scenarionet/scripts/convert_nuplan.py
+++ b/scenarionet/scripts/convert_nuplan.py
@@ -1,7 +1,3 @@
-"""
-This script aims to convert nuplan scenarios to ScenarioDescription, so that we can load any nuplan scenarios into
-MetaDrive.
-"""
 import argparse
 import os
 
diff --git a/scenarionet/scripts/convert_nuscenes.py b/scenarionet/scripts/convert_nuscenes.py
index 9bdbb65..aa93772 100644
--- a/scenarionet/scripts/convert_nuscenes.py
+++ b/scenarionet/scripts/convert_nuscenes.py
@@ -1,7 +1,3 @@
-"""
-This script aims to convert nuscenes scenarios to ScenarioDescription, so that we can load any nuscenes scenarios into
-MetaDrive.
-"""
 import argparse
 import os.path
 
diff --git a/scenarionet/scripts/convert_pg.py b/scenarionet/scripts/convert_pg.py
index 74bea65..31a779b 100644
--- a/scenarionet/scripts/convert_pg.py
+++ b/scenarionet/scripts/convert_pg.py
@@ -1,4 +1,3 @@
-# from metadrive.policy.expert_policy import ExpertPolicy
 import argparse
 import os.path
 
diff --git a/scenarionet/scripts/verify_dataset.py b/scenarionet/scripts/verify_dataset.py
index 89f3149..b8926f8 100644
--- a/scenarionet/scripts/verify_dataset.py
+++ b/scenarionet/scripts/verify_dataset.py
@@ -1,7 +1,3 @@
-"""
-This script aims to convert nuscenes scenarios to ScenarioDescription, so that we can load any nuscenes scenarios into
-MetaDrive.
-"""
 import argparse
 
 from scenarionet.verifier.utils import verify_loading_into_metadrive, set_random_drop