pyupgrade: automated removal of python2 constructs

using configuration:

```yaml
-   repo: https://github.com/asottile/pyupgrade
    rev: v2.1.0
    hooks:
    -   id: pyupgrade
        args: [--py3-plus, --keep-percent-format]
        exclude: ^tests/(extensions/data/|functional/|input/|regrtest_data/)
```

2 files changed, 4 insertions, 7 deletions

diff --git a/tests/utils/unittest_ast_walker.py b/tests/utils/unittest_ast_walker.py
index b8fb78eac..6f51d1781 100644
--- a/tests/utils/unittest_ast_walker.py
+++ b/tests/utils/unittest_ast_walker.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 # Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 # For details: https://github.com/PyCQA/pylint/blob/master/COPYING
 
@@ -11,15 +9,15 @@ from pylint.checkers.utils import check_messages
 from pylint.utils import ASTWalker
 
 
-class TestASTWalker(object):
-    class MockLinter(object):
+class TestASTWalker:
+    class MockLinter:
         def __init__(self, msgs):
             self._msgs = msgs
 
         def is_message_enabled(self, msgid):
             return self._msgs.get(msgid, True)
 
-    class Checker(object):
+    class Checker:
         def __init__(self):
             self.called = set()
 
@@ -50,7 +48,7 @@ class TestASTWalker(object):
         assert {"module", "assignname"} == checker.called
 
     def test_deprecated_methods(self):
-        class Checker(object):
+        class Checker:
             def __init__(self):
                 self.called = False
 
diff --git a/tests/utils/unittest_utils.py b/tests/utils/unittest_utils.py
index a009391de..387ee21b5 100644
--- a/tests/utils/unittest_utils.py
+++ b/tests/utils/unittest_utils.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright (c) 2013-2014 Google, Inc.
 # Copyright (c) 2013-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
 # Copyright (c) 2014 Arun Persaud <arun@nubati.net>