module_utils/six: PEP8 compliancy

- Make PEP8 compliant

lib/ansible/module_utils/six/_six.py

@@ -43,8 +43,6 @@ if PY3:
     class_types = type,
     text_type = str
     binary_type = bytes
-    cmp = lambda a, b: (a > b) - (a < b)
-
     MAXSIZE = sys.maxsize
 else:
     string_types = basestring,
@@ -52,7 +50,6 @@ else:
     class_types = (type, types.ClassType)
     text_type = unicode
     binary_type = str
-    cmp = cmp
 
     if sys.platform.startswith("java"):
         # Jython always uses 32 bits.

test/sanity/pep8/legacy-files.txt

@@ -70,7 +70,6 @@ lib/ansible/module_utils/pycompat24.py
 lib/ansible/module_utils/redhat.py
 lib/ansible/module_utils/service.py
 lib/ansible/module_utils/shell.py
-lib/ansible/module_utils/six/_six.py
 lib/ansible/module_utils/splitter.py
 lib/ansible/module_utils/univention_umc.py
 lib/ansible/module_utils/urls.py