Remove logging test stack

docker-compose.logging-test.yml

-version: "3.6"
-
-services:
-  whoami:
-    image: tutum/hello-world
-    ports:
-      - "8888:80"
-    logging:
-      driver: "fluentd"# Logging Driver
-      options:
-        tag: tutum    # TAG 
-    deploy:
-      restart_policy:
-           condition: on-failure
-           delay: 20s
-           max_attempts: 3
-           window: 120s
-      mode: replicated
-      replicas: 2
-      update_config:
-        delay: 2s