Database is not recreated in docker after removing the volume

After I delete the volume of the db service by running docker volume rm <volume_name>, the database is not recreated when I am rebuilding the container by docker-compose up -d --build. What is the reason ? My docker-compose file looks like this:

version: "2"
services:

    db:
      image: 'postgres:latest'
      ports:
        - "5432:5432"
      env_file:
        - .env
      volumes:
        - db:/var/lib/postgresql/data:rw
      restart: "always"

volumes:
  db: {}