remove an unused import

Author: keflavich

astroquery/desi/core.py

@@ -8,7 +8,6 @@
 import astropy.coordinates as coord
 
 from astropy import units as u
-from astropy.units import Quantity
 from astroquery.exceptions import NoResultsWarning
 from astroquery.query import BaseQuery
 from astroquery.utils import commons