Remove obsolete backport for oslo.log

The patch was merged upstream. Remove it from kolla tree since it
doesn't apply cleanly anymore and break openstack-base image building.

backport: liberty

Change-Id: Ia82aa10860d24d696a172ec6596076c9b6b2d0a5
Closes-Bug: #1505456

docker/openstack-base/0001-Fix-unintended-assignment-of-syslog.patch

-From ff277ae1e9b53b1844ecc220383ab9d39f954881 Mon Sep 17 00:00:00 2001
-From: Masaki Matsushita <glass.saga@gmail.com>
-Date: Fri, 25 Sep 2015 15:29:38 +0900
-Subject: [PATCH] Fix unintended assignment of "syslog"
-
-Identifier "syslog" is unintendedly reassigned in _setup_logging_from_conf()
-with OSSysLogHandler.
-It causes an error in _find_facility() which expects "syslog" as module.
-This change fixes the problem.
-
-Change-Id: Icd8486bc008028f6f78f0306d835bf2c4fb9245b
-Closes-Bug: #1499620
----
- oslo_log/log.py | 4 ++--
- 1 file changed, 2 insertions(+), 2 deletions(-)
-
-diff --git a/oslo_log/log.py b/oslo_log/log.py
-index 7ec89be..9f3949f 100644
---- a/oslo_log/log.py
-+++ b/oslo_log/log.py
-@@ -343,10 +343,10 @@ def _setup_logging_from_conf(conf, project, version):
-         facility = _find_facility(conf.syslog_log_facility)
-         # TODO(bogdando) use the format provided by RFCSysLogHandler after
-         # existing syslog format deprecation in J
--        syslog = handlers.OSSysLogHandler(
-+        syslog_handler = handlers.OSSysLogHandler(
-             facility=facility,
-             use_syslog_rfc_format=conf.use_syslog_rfc_format)
--        log_root.addHandler(syslog)
-+        log_root.addHandler(syslog_handler)
- 
-     datefmt = conf.log_date_format
-     for handler in log_root.handlers:
--- 
-2.1.0
-

docker/openstack-base/Dockerfile.j2

@@ -8,7 +8,6 @@ RUN yum -y install \
         mariadb-libs \
         MySQL-python \
         openssl \
-        patch \
     && yum clean all
 {% endif %}
 
@@ -68,7 +67,6 @@ RUN apt-get install -y --no-install-recommends \
         libxslt1-dev \
         libffi-dev \
         libyaml-dev \
-        patch \
         pkg-config \
         git \
     && apt-get clean
@@ -97,11 +95,4 @@ RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py \
         python-openstackclient \
         MySQL-python
 
-# TODO(sdake):  Remove a backport of a patch which is not yet in the packaging
-#               to make oslo.log work properly once the patch is in oslo.log
-#               NB: Please remove patch from the list of packages for both
-#                   RPM and APT.
-COPY 0001-Fix-unintended-assignment-of-syslog.patch /
-RUN patch -p1 -d /usr/lib/python2.7/site-packages < /0001-Fix-unintended-assignment-of-syslog.patch
-
 {% endif %}