Remove legacy __future__ import in Alembic templates (Fixes #504)

Author: pamelafox

src/flask_migrate/templates/aioflask-multidb/env.py

@@ -1,5 +1,3 @@
-from __future__ import with_statement
-
 import asyncio
 import logging
 from logging.config import fileConfig

src/flask_migrate/templates/aioflask/env.py

@@ -1,5 +1,3 @@
-from __future__ import with_statement
-
 import asyncio
 import logging
 from logging.config import fileConfig

src/flask_migrate/templates/flask-multidb/env.py

@@ -1,5 +1,3 @@
-from __future__ import with_statement
-
 import logging
 from logging.config import fileConfig
 

src/flask_migrate/templates/flask/env.py

@@ -1,5 +1,3 @@
-from __future__ import with_statement
-
 import logging
 from logging.config import fileConfig
 

tests/custom_template/env.py

@@ -1,6 +1,4 @@
 # Custom template
-from __future__ import with_statement
-
 import logging
 from logging.config import fileConfig