remove ml node.role

salt/elasticsearch/files/elasticsearch.yml

@@ -56,7 +56,7 @@ discovery.seed_hosts:
       {%- endfor %}
     {%- endif %}
   {%- else %}
-node.roles: [ data, ingest, ml ]
+node.roles: [ data, ingest ]
 discovery.seed_hosts:
    - {{ grains.master }}
   {%- endif %}