flake fix

remove unused import X_PLEX_CONTAINER_SIZE

Author: blacktwin

plexapi/base.py

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 import re
 
-from plexapi import log, utils, X_PLEX_CONTAINER_SIZE
+from plexapi import log, utils
 from plexapi.compat import quote_plus, urlencode
 from plexapi.exceptions import BadRequest, NotFound, UnknownType, Unsupported
 from plexapi.utils import tag_helper