Remove log filter for unused libraries

qpid-python was used in Python 2[1], but has been unused since Python 2
support was removed.

Also amqplib was replaced by amqp, in kombu 2.5.0[2]. oslo.messaging
required kombu>=3.0.25 at Newton, and we can safely assume that recent
deployment uses a much newer version.

[1] 0fa5a87c54e8958694fb3acd24a72c6a444ebae1
[2] 95615d5b626913a8beac0b383d8da16bbf405acd

Change-Id: I399cfce8d1cf7e334e4bd10c36c7fcb0ff780ee3

doc/source/user/guidelines.rst

@@ -322,7 +322,6 @@ Currently proposed settings for 3rd party libraries:
 
 - ``amqp=WARN``
 - ``boto=WARN``
-- ``qpid=WARN``
 - ``sqlalchemy=WARN``
 - ``suds=INFO``
 - ``iso8601=WARN``

oslo_log/_options.py

@@ -16,8 +16,7 @@ from oslo_log import versionutils
 
 _DEFAULT_LOG_DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
 
-DEFAULT_LOG_LEVELS = ['amqp=WARN', 'amqplib=WARN', 'boto=WARN',
-                      'qpid=WARN', 'sqlalchemy=WARN', 'suds=INFO',
+DEFAULT_LOG_LEVELS = ['amqp=WARN', 'boto=WARN', 'sqlalchemy=WARN', 'suds=INFO',
                       'oslo.messaging=INFO', 'oslo_messaging=INFO',
                       'iso8601=WARN',
                       'requests.packages.urllib3.connectionpool=WARN',