Drone currently instantiates Postgres, Memcached and Redis services even though our testsetup doesn't use them (yet). To keep this clean(er), I'm removing them here for now. Even if we pull in tests for these right now, we would have to rewrite drone.yml, since they are not configured. Thus lets remove it and add it again when we need it.
joomla-cms-bot
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As per glip we need to add cache tests back not remove the services