去除不必要的serializer

utils/api/_serializers.py

@@ -1,12 +1,6 @@
 from rest_framework import serializers
 
 
-class DateTimeTZField(serializers.DateTimeField):
-    def to_representation(self, value):
-        # value = timezone.localtime(value)
-        return super(DateTimeTZField, self).to_representation(value)
-
-
 class UsernameSerializer(serializers.Serializer):
     id = serializers.IntegerField()
     username = serializers.CharField()