Remove log translations

Log messages are no longer being translated.
This removes all use of the _LE, _LI, and _LW
translation markers to simplify logging and to
avoid confusion with new contributions.

See:
http://lists.openstack.org/pipermail/openstack-i18n/2016-November/002574.html
http://lists.openstack.org/pipermail/openstack-dev/2017-March/113365.html

Change-Id: Iec2ef31f8543d51c8b6e1aed53f950800813c30b

oslo_concurrency/_i18n.py

@@ -20,13 +20,3 @@ _translators = oslo_i18n.TranslatorFactory(domain='oslo_concurrency')
 
 # The primary translation function using the well-known name "_"
 _ = _translators.primary
-
-# Translators for log levels.
-#
-# The abbreviated names are meant to reflect the usual use of a short
-# name like '_'. The "L" is for "log" and the other letter comes from
-# the level.
-_LI = _translators.log_info
-_LW = _translators.log_warning
-_LE = _translators.log_error
-_LC = _translators.log_critical

oslo_concurrency/lockutils.py

@@ -30,7 +30,7 @@ from oslo_utils import reflection
 from oslo_utils import timeutils
 import six
 
-from oslo_concurrency._i18n import _, _LI
+from oslo_concurrency._i18n import _
 
 
 LOG = logging.getLogger(__name__)
@@ -158,7 +158,7 @@ def remove_external_lock_file(name, lock_file_prefix=None, lock_path=None,
         try:
             os.remove(lock_file_path)
         except OSError:
-            LOG.info(_LI('Failed to remove file %(file)s'),
+            LOG.info('Failed to remove file %(file)s',
                      {'file': lock_file_path})