fix: remove cs-firewall-bouncer from image pre-pull list

crowdsecurity/cs-firewall-bouncer:v0.0.31 does not exist on Docker Hub.
The bouncer service was already removed from docker-compose.yml.
Remove from pre-pull list and defaults to unblock CI/CD deploy.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

roles/services/defaults/main.yml

@@ -28,7 +28,6 @@ alertmanager_image:  "prom/alertmanager:v0.28.1"                   # https://hub
 loki_image:          "grafana/loki:3.4.3"                          # https://hub.docker.com/r/grafana/loki/tags
 promtail_image:      "grafana/promtail:3.4.3"                      # https://hub.docker.com/r/grafana/promtail/tags
 crowdsec_image:      "crowdsecurity/crowdsec:v1.6.8"               # https://hub.docker.com/r/crowdsecurity/crowdsec/tags
-crowdsec_bouncer_image: "crowdsecurity/cs-firewall-bouncer:v0.0.31" # https://hub.docker.com/r/crowdsecurity/cs-firewall-bouncer/tags
 authelia_image:      "authelia/authelia:4.38"                      # https://hub.docker.com/r/authelia/authelia/tags
 redis_image:         "redis:7-alpine"                              # shared with plane-redis
 authelia_admin_user: "admin"

roles/services/tasks/main.yml

@@ -26,7 +26,6 @@
     - "{{ loki_image }}"
     - "{{ promtail_image }}"
     - "{{ crowdsec_image }}"
-    - "{{ crowdsec_bouncer_image }}"
     - "{{ authelia_image }}"
     - "{{ uptime_kuma_image }}"
   register: pull_result