Fix lint issues

gwcelery/tasks/raven.py

@@ -3,7 +3,6 @@ import ligo.raven.search
 import json
 from celery import group
 from celery.utils.log import get_task_logger
-from ligo.gracedb.exceptions import HTTPError
 from ligo.raven import gracedb_events
 
 from ..import app
@@ -43,21 +42,21 @@ def calculate_coincidence_far(superevent, exttrig, group):
         tl, th = tl_cbc, th_cbc
     elif group == 'Burst':
         tl, th = tl_burst, th_burst
-     
+
     if {'LUMIN_GO', 'SKYMAP_READY'}.issubset(exttrig['labels']):
-        #  if both sky maps available, calculate spat coinc far
+        #  if both sky maps available, calculate spatial coinc far
         se_skymap = external_skymaps.get_preferred_skymap(
             superevent_id)
         ext_skymap = external_skymaps.get_external_skymap_filename(
             exttrig_id)
 
-        return ligo.raven.search.calc_signif_gracedb(
+       return ligo.raven.search.calc_signif_gracedb(
                    superevent_id, exttrig_id, tl, th,
                    grb_search=exttrig['search'],
                    se_fitsfile=se_skymap, ext_fitsfile=ext_skymap,
                    incl_sky=True, gracedb=gracedb.client)
     else:
-         return ligo.raven.search.calc_signif_gracedb(
+        return ligo.raven.search.calc_signif_gracedb(
                    superevent_id, exttrig_id, tl, th,
                    grb_search=exttrig['search'],
                    incl_sky=False, gracedb=gracedb.client)