Remove unused imports in modeling.py
Model parameter handling
"""
from __future__ import absolute_import, division, print_function, unicode_literals
-import abc
import numpy as np
import copy
from ..extern import six
from astropy import units as u
from astropy.table import Table, Column, vstack
-from ..extern import xmltodict
-from .scripts import make_path
__all__ = [
'Parameter',
