fix: remove unused celery-worker service

todo-app doesn't use Celery — the worker container was stuck in
Created state since celery isn't in requirements.txt.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: baijum

deploy/docker-compose.yml

@@ -23,25 +23,6 @@ services:
           cpus: '0.25'
           memory: 256M
 
-  celery-worker:
-    build:
-      context: ..
-      dockerfile: app/Dockerfile
-    command: celery -A app.tasks worker --loglevel=info
-    env_file:
-      - .env
-    restart: unless-stopped
-    networks:
-      - towlion
-    deploy:
-      resources:
-        limits:
-          cpus: '0.25'
-          memory: 256M
-        reservations:
-          cpus: '0.10'
-          memory: 128M
-
 networks:
   towlion:
     external: true