Removes some useless compatibility code.

cachalot/tests/postgres.py

@@ -22,7 +22,7 @@ from .models import PostgresModel, Test
 @skipIf(isinstance(caches['default'], FileBasedCache)
         and python_version_tuple()[:2] == ('2', '7'),
         'Caching psycopg2 objects is not working with file-based cache '
-        'and Python 2.7.')
+        'and Python 2.7 (see https://code.djangoproject.com/ticket/25501).')
 @override_settings(USE_TZ=True)
 class PostgresReadTest(TransactionTestCase):
     def setUp(self):

cachalot/tests/thread_safety.py

@@ -3,7 +3,6 @@
 from __future__ import unicode_literals
 from threading import Thread
 
-from django import VERSION as django_version
 from django.db import connection, transaction
 from django.test import TransactionTestCase, skipUnlessDBFeature
 
@@ -24,7 +23,7 @@ class TestThread(Thread):
 @skipUnlessDBFeature('test_db_allows_multiple_connections')
 class ThreadSafetyTestCase(TransactionTestCase):
     def setUp(self):
-        if django_version >= (1, 7) and connection.vendor == 'mysql':
+        if connection.vendor == 'mysql':
             # We need to reopen the connection or Django
             # will execute an extra SQL request below.
             connection.cursor()

cachalot/tests/transaction.py

@@ -12,7 +12,7 @@ from .models import Test
 
 class AtomicTestCase(TransactionTestCase):
     def setUp(self):
-        if django_version >= (1, 7) and connection.vendor == 'mysql':
+        if connection.vendor == 'mysql':
             # We need to reopen the connection or Django
             # will execute an extra SQL request below.
             connection.cursor()