diff --git a/drees.py b/drees.py
index 7354659..98ffd97 100644
--- a/drees.py
+++ b/drees.py
@@ -3,7 +3,7 @@ import json
 import logging
 import os
 from datetime import datetime as dt
-from enum import Enum, IntEnum
+from enum import Enum
 from functools import partial
 from multiprocessing import Pool
 from typing import Any, Dict, List, Optional, OrderedDict, Tuple
@@ -17,7 +17,6 @@ FORMAT = "%(asctime)s - %(levelname)s - %(message)s"
 logging.basicConfig(format=FORMAT, level=logging.INFO)
 
 DATE_FORMAT = "%Y-%m-%d"
-PLOT_FORMAT = "png"
 
 DATA_URL = "https://data.drees.solidarites-sante.gouv.fr/api/records/1.0/search/?dataset=covid-19-resultats-par-age-issus-des-appariements-entre-si-vic-si-dep-et-vac-si&q=&rows=-1&facet=date&facet=vac_statut&facet=age"
 DATA_REPOSITORY = "data"