Remove Python 2.6 compatibility module

Support was dropped in 5a67dc3af5.

tests/asserts.py

@@ -1,36 +0,0 @@
-from nose.tools import assert_true, assert_false
-
-
-'''
-Various nose.tools helpers that doesn't exists in Python 2.6 Unittest :(
-Must be removed with drop Python 2.6 support
-'''
-
-
-def assert_is_instance(obj, cls, msg=None):
-    """Same as assert_true(isinstance(obj, cls)), with a nicer
-    default message."""
-    if not msg:
-        msg = '{orig} is not an instance of {test}'.format(orig=type(obj), test=cls)
-    assert_true(isinstance(obj, cls), msg=msg)
-
-
-def assert_is_none(obj, msg=None):
-    """Same as assert_true(obj is None), with a nicer default message."""
-    if not msg:
-        msg = '{orig!r} is not None'.format(orig=obj)
-    assert_true(obj is None, msg=msg)
-
-
-def assert_is_not_none(obj, msg=None):
-    """Same as assert_false(obj is None), with a nicer default message."""
-    if not msg:
-        msg = '{orig!r} is None'.format(orig=obj)
-    assert_false(obj is None, msg=msg)
-
-
-def assert_in(member, container, msg=None):
-    """Just like assert_true(a in b), but with a nicer default message."""
-    if not msg:
-        msg = '{member!r} not found in {container!r}'.format(member=member, container=container)
-    assert_true(member in container, msg=msg)

tests/directives/test_block.py

@@ -1,5 +1,4 @@
-from nose.tools import assert_equals, assert_true, assert_false
-from tests.asserts import assert_is_instance, assert_is_none, assert_is_not_none
+from nose.tools import assert_equals, assert_true, assert_false, assert_is_instance, assert_is_none, assert_is_not_none
 from gixy.parser.nginx_parser import NginxParser
 from gixy.directives.block import *
 

tests/directives/test_directive.py

@@ -1,5 +1,4 @@
-from nose.tools import assert_equals, assert_false, assert_true
-from tests.asserts import assert_is_instance
+from nose.tools import assert_equals, assert_false, assert_true, assert_is_instance
 from gixy.parser.nginx_parser import NginxParser
 from gixy.directives.directive import *
 

tests/parser/test_nginx_parser.py

@@ -1,5 +1,4 @@
-from nose.tools import assert_equal
-from tests.asserts import assert_is_instance
+from nose.tools import assert_equal, assert_is_instance
 from gixy.parser.nginx_parser import NginxParser
 from gixy.directives.directive import *
 from gixy.directives.block import *

tests/plugins/test_simply.py

@@ -1,5 +1,4 @@
-from nose.tools import assert_equals, assert_true
-from tests.asserts import assert_in
+from nose.tools import assert_equals, assert_true, assert_in
 import os
 from os import path
 import json