fix(docker): remove interactive container update check from setup_docker

The 'Interactive Container Update Check' block scanned ALL running
Docker containers, pulled their images, then stopped and removed them
with only a message asking the user to manually recreate them.  This
is destructive and outside the scope of the Docker LXC update script,
which is responsible for updating the Docker engine itself and the
Portainer / Portainer-Agent containers that this script originally
installed.

Removes the entire block.  Updates now cover:
  - OS packages (apt)
  - Docker engine (via setup_docker / repo)
  - Portainer CE (if installed by this script)
  - Portainer Agent (if installed by this script)

Self-hosted / user-managed containers are intentionally left alone.

Fixes #15601

misc/tools.func

@@ -4641,66 +4641,6 @@ EOF
     fi
   fi
 
-  # Interactive Container Update Check
-  if [[ "${DOCKER_SKIP_UPDATES:-}" != "true" ]] && [ "$docker_installed" = true ] && ! _docker_is_noninteractive; then
-    msg_info "Checking for container updates"
-
-    # Get list of running containers with update status
-    local containers_with_updates=()
-    local container_info=()
-    local index=1
-
-    while IFS= read -r container; do
-      local name=$(echo "$container" | awk '{print $1}')
-      local image=$(echo "$container" | awk '{print $2}')
-      local current_digest=$(docker inspect "$name" --format='{{.Image}}' 2>/dev/null | cut -d':' -f2 | cut -c1-12)
-
-      # Pull latest image digest (ignore failures, e.g. local-only images or registry/permission issues)
-      docker pull "$image" >/dev/null 2>&1 || true
-      local latest_digest=$(docker inspect "$image" --format='{{.Id}}' 2>/dev/null | cut -d':' -f2 | cut -c1-12)
-
-      if [ -n "$latest_digest" ] && [ "$current_digest" != "$latest_digest" ]; then
-        containers_with_updates+=("$name")
-        container_info+=("${index}) ${name} (${image})")
-        ((index++))
-      fi
-    done < <(docker ps --format '{{.Names}} {{.Image}}')
-
-    if [ ${#containers_with_updates[@]} -gt 0 ]; then
-      echo ""
-      echo "${TAB3}Container updates available:"
-      for info in "${container_info[@]}"; do
-        echo "${TAB3}  $info"
-      done
-      echo ""
-      read -r -p "${TAB3}Select containers to update (e.g., 1,3,5 or 'all' or 'none'): " selection
-
-      if [[ ${selection,,} == "all" ]]; then
-        for container in "${containers_with_updates[@]}"; do
-          msg_info "Updating container: $container"
-          docker stop "$container"
-          docker rm "$container"
-          # Note: This requires the original docker run command - best to recreate via compose
-          msg_ok "Stopped and removed $container (please recreate with updated image)"
-        done
-      elif [[ ${selection,,} != "none" ]]; then
-        IFS=',' read -ra SELECTED <<<"$selection"
-        for num in "${SELECTED[@]}"; do
-          num=$(echo "$num" | xargs) # trim whitespace
-          if [[ "$num" =~ ^[0-9]+$ ]] && [ "$num" -ge 1 ] && [ "$num" -le "${#containers_with_updates[@]}" ]; then
-            container="${containers_with_updates[$((num - 1))]}"
-            msg_info "Updating container: $container"
-            docker stop "$container"
-            docker rm "$container"
-            msg_ok "Stopped and removed $container (please recreate with updated image)"
-          fi
-        done
-      fi
-    else
-      msg_ok "All containers are up-to-date"
-    fi
-  fi
-
   msg_ok "Docker setup completed"
 }