fix: remove unused imports

src/cal_tools/constants.py

@@ -4,19 +4,17 @@ from hashlib import md5
 from pathlib import Path
 from shutil import copyfile
 from struct import pack, unpack
-from typing import List, Optional, Union
+from typing import List, Union
 
 import h5py
 import numpy as np
-from calibration_client import CalibrationClient
 
 from cal_tools.calcat_interface2 import (
     CalCatAPIError,
     get_default_caldb_root,
 )
-from cal_tools.restful_config import calibration_client
-from dataclasses import asdict, dataclass, field
-from typing import List, Optional, Tuple, Union
+from dataclasses import asdict, dataclass
+from typing import List, Tuple, Union
 from datetime import datetime, timezone
 
 @dataclass