Remove kibana_base_url

The default for kibana_base_url does not make sense an makes kibana unusable. The default path forces a 404 when you try to open kibana in the browser. Not setting kibana_base_url works just fine.

roles/kubernetes-apps/efk/kibana/defaults/main.yml

@@ -4,4 +4,3 @@ kibana_mem_limit: 0M
 kibana_cpu_requests: 100m
 kibana_mem_requests: 0M
 kibana_service_port: 5601
-kibana_base_url: "/api/v1/proxy/namespaces/kube-system/services/kibana-logging"