[Enhance] Remove useless json file converter (#1971)

Author: Xiangxu-0103

tools/create_data.py

@@ -35,9 +35,6 @@ def kitti_data_prep(root_path,
     info_train_path = osp.join(out_dir, f'{info_prefix}_infos_train.pkl')
     info_val_path = osp.join(out_dir, f'{info_prefix}_infos_val.pkl')
     info_trainval_path = osp.join(out_dir, f'{info_prefix}_infos_trainval.pkl')
-    kitti.export_2d_annotation(root_path, info_train_path)
-    kitti.export_2d_annotation(root_path, info_val_path)
-    kitti.export_2d_annotation(root_path, info_trainval_path)
     update_pkl_infos('kitti', out_dir=out_dir, pkl_path=info_train_path)
     update_pkl_infos('kitti', out_dir=out_dir, pkl_path=info_val_path)
     update_pkl_infos('kitti', out_dir=out_dir, pkl_path=info_trainval_path)
@@ -76,17 +73,11 @@ def nuscenes_data_prep(root_path,
 
     if version == 'v1.0-test':
         info_test_path = osp.join(out_dir, f'{info_prefix}_infos_test.pkl')
-        nuscenes_converter.export_2d_annotation(
-            root_path, info_test_path, version=version)
         update_pkl_infos('nuscenes', out_dir=out_dir, pkl_path=info_test_path)
         return
 
     info_train_path = osp.join(out_dir, f'{info_prefix}_infos_train.pkl')
     info_val_path = osp.join(out_dir, f'{info_prefix}_infos_val.pkl')
-    nuscenes_converter.export_2d_annotation(
-        root_path, info_train_path, version=version)
-    nuscenes_converter.export_2d_annotation(
-        root_path, info_val_path, version=version)
     update_pkl_infos('nuscenes', out_dir=out_dir, pkl_path=info_train_path)
     update_pkl_infos('nuscenes', out_dir=out_dir, pkl_path=info_val_path)
     create_groundtruth_database(dataset_name, root_path, info_prefix,