[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

widgets/serializers/widget_instance.py

@@ -1,6 +1,5 @@
 """WidgetInstnace serializer"""
 
-
 from rest_framework import serializers
 
 from main.serializers import WriteableSerializerMethodField