ci: detect nginx brotli via config test

scripts/jenkins-server-provision.sh

@@ -301,11 +301,6 @@ render_nginx_brotli_directives() {
     return
   fi
 
-  if ! nginx -V 2>&1 | grep -qi brotli; then
-    echo "    # Brotli 未启用：当前 nginx 未编译或加载 brotli 模块。"
-    return
-  fi
-
   local brotli_snippet
   brotli_snippet="$(mktemp)"
   cat >"${brotli_snippet}" <<'EOF'