remove unused imports

src/stage0/birdie/models.py

@@ -1,10 +1,7 @@
-import transaction
-
 from sqlalchemy import Column
 from sqlalchemy import Integer
 from sqlalchemy import Unicode
 
-from sqlalchemy.exc import IntegrityError
 from sqlalchemy.ext.declarative import declarative_base
 
 from sqlalchemy.orm import scoped_session

src/stage0/birdie/tests.py

@@ -1,5 +1,4 @@
 import unittest
-from pyramid.config import Configurator
 from pyramid import testing
 
 def _initTestingDB():

src/stage1/birdie/models.py

@@ -1,16 +1,12 @@
-import transaction
-
 from sqlalchemy import Column
 from sqlalchemy import TIMESTAMP
 from sqlalchemy import Unicode
 from sqlalchemy import Integer
 
-from sqlalchemy.exc import IntegrityError
 from sqlalchemy.ext.declarative import declarative_base
 
 from sqlalchemy.orm import scoped_session
 from sqlalchemy.orm import sessionmaker
-from sqlalchemy.orm import column_property
 
 from zope.sqlalchemy import ZopeTransactionExtension
 

src/stage1/birdie/tests.py

@@ -1,5 +1,4 @@
 import unittest
-from pyramid.config import Configurator
 from pyramid import testing
 
 def _initTestingDB():

src/stage2/birdie/models.py

@@ -1,19 +1,14 @@
-import transaction
-
 from sqlalchemy import Column
 from sqlalchemy import TIMESTAMP
 from sqlalchemy import Unicode
 from sqlalchemy import Integer
 from sqlalchemy import ForeignKey
 
-from sqlalchemy.exc import IntegrityError
 from sqlalchemy.ext.declarative import declarative_base
 
 from sqlalchemy.orm import scoped_session
 from sqlalchemy.orm import sessionmaker
-from sqlalchemy.orm import column_property
 from sqlalchemy.orm import relationship
-from sqlalchemy.orm import backref
 from zope.sqlalchemy import ZopeTransactionExtension
 
 from pyramid.security import Authenticated

src/stage2/birdie/tests.py

@@ -1,5 +1,4 @@
 import unittest
-from pyramid.config import Configurator
 from pyramid import testing
 
 def _initTestingDB():