fix formatting issues for list serializer validation fix

tests/test_serializer.py

@@ -3,7 +3,6 @@ import pickle
 import re
 import sys
 import unittest
-
 from collections import ChainMap
 from collections.abc import Mapping
 
@@ -844,64 +843,4 @@ class TestMultipleObjectsValidation(unittest.TestCase):
                 instance=self.objs[:-1],
                 many=True,
                 partial=True,
-            )
-
-
-class MyClass(models.Model):
-    name = models.CharField(max_length=100)
-    value = models.CharField(max_length=100, blank=True)
-
-    app_label = "test"
-
-    @property
-    def is_valid(self):
-        return self.name == 'valid'
-
-
-class MyClassSerializer(serializers.ModelSerializer):
-    class Meta:
-        model = MyClass
-        fields = ('id', 'name', 'value')
-
-    def validate_value(self, value):
-        if value and not self.instance.is_valid:
-            raise serializers.ValidationError(
-                'Status cannot be set for invalid instance')
-        return value
-
-
-class TestMultipleObjectsValidation(unittest.TestCase):
-    def setUp(self):
-        self.objs = [
-            MyClass(name='valid'),
-            MyClass(name='invalid'),
-            MyClass(name='other'),
-        ]
-
-    def test_multiple_objects_are_validated_separately(self):
-
-        serializer = MyClassSerializer(
-            data=[{'value': 'set', 'id': instance.id} for instance in
-                  self.objs],
-            instance=self.objs,
-            many=True,
-            partial=True,
-        )
-
-        assert not serializer.is_valid()
-        assert serializer.errors == [
-            {},
-            {'value': ['Status cannot be set for invalid instance']},
-            {'value': ['Status cannot be set for invalid instance']}
-        ]
-
-    def test_exception_raised_when_data_and_instance_length_different(self):
-
-        with self.assertRaises(AssertionError):
-            serializer = MyClassSerializer(
-                data=[{'value': 'set', 'id': instance.id} for instance in
-                      self.objs],
-                instance=self.objs[:-1],
-                many=True,
-                partial=True,
             )