code: def clear_calibrations():
      
      calibration_path = CONFIG['labware_calibration_offsets_dir_v4']
      try:
          targets = [
              f for f in calibration_path.iterdir() if f.suffix == '.json']
          for target in targets:
              target.unlink()
      except FileNotFoundError:
          pass
docs: Delete all calibration files for labware. This includes deleting tip-length
      data for tipracks.