Get rid of all __all__

The "from <module> import *" is forbidden and private
objects are prefixed with an underscore, so the `__all__`
variable won't be necessary.

Change-Id: If09af33adba2fc7019e439ec947dc191e03dcc3a

cloudbaseinit/plugins/common/execcmd.py

@@ -23,17 +23,6 @@ from cloudbaseinit.openstack.common import log as logging
 from cloudbaseinit.osutils import factory as osutils_factory
 
 
-__all__ = (
-    'BaseCommand',
-    'Shell',
-    'Python',
-    'Bash',
-    'Powershell',
-    'PowershellSysnative',
-    'CommandExecutor',
-    'EC2Config',
-)
-
 LOG = logging.getLogger(__name__)
 
 # used with ec2 config files (xmls)

cloudbaseinit/plugins/common/userdataplugins/cloudconfigplugins/base.py

@@ -17,11 +17,6 @@ import abc
 import six
 
 
-__all__ = (
-    'BaseCloudConfigPlugin',
-)
-
-
 @six.add_metaclass(abc.ABCMeta)
 class BaseCloudConfigPlugin(object):
     """Base plugin class for cloud-config plugins."""

cloudbaseinit/tests/testutils.py

@@ -33,14 +33,6 @@ from cloudbaseinit.openstack.common import log as logging
 
 CONF = cfg.CONF
 
-__all__ = (
-    'create_tempfile',
-    'create_tempdir',
-    'LogSnatcher',
-    'CloudbaseInitTestBase',
-    'ConfPatcher',
-)
-
 
 @contextlib.contextmanager
 def create_tempdir():