Changes, style, test fixes

Fix changelog

Author: snbianco

CHANGES.rst

@@ -176,8 +176,8 @@ simbad
 Service fixes and enhancements
 ------------------------------
 
-gaia
-^^^^
+linelists.cdms
+^^^^^^^^^^^^^^
 
 - Update DR4 retrieval_type names and include the new one
   EPOCH_ASTROMETRY_BRIGHT. [#3207, #3238]

astroquery/mast/missions.py

@@ -19,7 +19,7 @@
 from requests import HTTPError, RequestException
 
 from astroquery import log
-from astroquery.utils import commons, async_to_sync
+from astroquery.utils import async_to_sync
 from astroquery.utils.class_or_instance import class_or_instance
 from astropy.utils.console import ProgressBarOrSpinner
 from astroquery.exceptions import InvalidQueryError, MaxResultsWarning, NoResultsWarning