[flake8] remove en useless import

cubicweb_elasticsearch/views.py

@@ -28,7 +28,7 @@ import cwtags.tag as t
 from cubicweb import _
 from cubicweb.view import StartupView
 
-from cubicweb_elasticsearch.es import indexable_types, get_connection
+from cubicweb_elasticsearch.es import get_connection
 from cubicweb_elasticsearch.search_helpers import compose_search