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
Andreas Jaeger
454d834bce