chore: 清理 pi-mcp-adapter 移除后的陈旧引用

Pi 0.99+ 已内置 MCP（builtin:mcp），组合包不再加载 adapter；
删除引用不存在 mcp 工具的 mcp-management 分组，并把权限文档
中的 MCP 表述澄清为内置 mcp__<server>__<tool> 命名。

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pi-tool-search/extensions/bundle-groups.ts

@@ -184,15 +184,6 @@ export const BUNDLE_GROUP_DEFINITIONS: BundleGroupDefinition[] = [
     keywords: ["chrome", "browser", "console", "network", "javascript", "upload", "调试", "网络请求", "文件上传"],
     tools: ["chrome_evaluate", "chrome_list_console_messages", "chrome_list_network_requests", "chrome_get_network_request", "chrome_upload_file"],
   },
-  {
-    id: "mcp-management",
-    title: "MCP management",
-    summary: "Inspect and manage MCP server connections exposed by Pi's shared adapter.",
-    useWhen: ["The user explicitly asks about MCP server status or operations"],
-    avoidWhen: ["A mapped first-class MCP tool already handles the task"],
-    keywords: ["mcp", "server", "connection", "MCP 服务", "连接"],
-    tools: ["mcp"],
-  },
 ];
 
 export interface BundleCatalogResult {