Remove workaround for query_next misbehaving.

Now that
googleapis/google-api-python-client#1403 is
fixed, remove the workaround.

Fixes: b/190349928
Change-Id: Ia278d6aefa9508be548888a1bc2d83fa59a12541

gcp_doctor/queries/monitoring.py

@@ -166,19 +166,8 @@ def query(context: models.Context, query_str: str) -> TimeSeriesCollection:
         pages += 1
         response = request.execute()
         time_series.add_api_response(response)
-        # Workaround for
-        # https://github.com/googleapis/google-api-python-client/issues/1403
-        if 'nextPageToken' in response and response['nextPageToken']:
-          request = mon_api.projects().timeSeries().query(
-              name='projects/' + project_id,
-              body={
-                  'query': query_str,
-                  'pageToken': response['nextPageToken']
-              })
-        else:
-          break
-        #request = mon_api.projects().timeSeries().query_next(
-        #    previous_request=request, previous_response=response)
+        request = mon_api.projects().timeSeries().query_next(
+            previous_request=request, previous_response=response)
       end_time = datetime.datetime.now()
       logging.debug('query run time: %s, pages: %d', end_time - start_time,
                     pages)