Remove unneeded Zuul branch matcher

We have implicit branch matchers, so there's no need to add a check for
not-ocata, this job is only run for the branch it's on - like master
now.

Remove it to not confuse Zuul when multiple branches matches and the job
is different.

Change-Id: I2052e6c9cf1082f238988eeb9f6a20341d2d4886

.zuul.d/centos.yaml

@@ -46,10 +46,8 @@
               - ^setup.py$
     periodic:
       jobs:
-        - kolla-publish-centos-source:
-            branches: ^(?!stable/ocata).*$
-        - kolla-publish-centos-binary:
-            branches: ^(?!stable/ocata).*$
+        - kolla-publish-centos-source
+        - kolla-publish-centos-binary
     release:
       jobs:
         - kolla-publish-centos-source