Update docker-security.md

Author: aetter

docs/install/docker-security.md

@@ -128,7 +128,6 @@ opendistro_security.enable_snapshot_restore_privilege: true
 opendistro_security.check_snapshot_restore_write_privileges: true
 opendistro_security.restapi.roles_enabled: ["all_access", "security_rest_api_access"]
 cluster.routing.allocation.disk.threshold_enabled: false
-node.max_local_storage_nodes: 3
 opendistro_security.audit.config.disabled_rest_categories: NONE
 opendistro_security.audit.config.disabled_transport_categories: NONE
 ```