Remove remaining __future__ imports.

tests/test_project/app_add_not_null_column_followed_by_default/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:54
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_add_not_null_column_followed_by_default/migrations/0002_a_not_null_field.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:55
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 from django_add_default_value import AddDefaultValue

tests/test_project/app_add_not_null_column_followed_by_default/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models
 

tests/test_project/app_alter_column/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:56
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_alter_column/migrations/0002_auto_20190414_1456.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:56
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_alter_column/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models
 

tests/test_project/app_create_table_with_not_null_column/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:59
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_create_table_with_not_null_column/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models
 

tests/test_project/app_drop_column/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:59
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_drop_column/migrations/0002_remove_a_field_b.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:59
-from __future__ import unicode_literals
+
 
 from django.db import migrations
 

tests/test_project/app_drop_column/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models
 

tests/test_project/app_drop_table/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 14:59
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_drop_table/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models
 

tests/test_project/app_rename_column/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 15:02
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_rename_column/migrations/0002_auto_20190414_1502.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 15:02
-from __future__ import unicode_literals
+
 
 from django.db import migrations
 

tests/test_project/app_rename_column/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models
 

tests/test_project/app_rename_table/migrations/0001_initial.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 15:00
-from __future__ import unicode_literals
+
 
 from django.db import migrations, models
 

tests/test_project/app_rename_table/migrations/0002_auto_20190414_1500.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.18 on 2019-04-14 15:00
-from __future__ import unicode_literals
+
 
 from django.db import migrations
 

tests/test_project/app_rename_table/models.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+
 
 from django.db import models