refactor(agents): drop mcp fetch type re-export

src/agents/mcp-http-fetch.test.ts

@@ -1,4 +1,5 @@
 import { parseErrorResponse } from "@modelcontextprotocol/sdk/client/auth.js";
+import type { FetchLike } from "@modelcontextprotocol/sdk/shared/transport.js";
 /**
  * Regression coverage for MCP HTTP fetch wrappers.
  * Verifies SSRF-guarded fetch, scoped dispatcher behavior, and same-origin headers.
@@ -9,7 +10,6 @@ import {
   buildMcpHttpFetch,
   withoutMcpAuthorizationHeader,
   withSameOriginMcpHttpHeaders,
-  type FetchLike,
 } from "./mcp-http-fetch.js";
 
 const testGlobal = globalThis as Record<string, unknown>;

src/agents/mcp-http-fetch.ts

@@ -12,9 +12,6 @@ import {
 } from "../infra/net/ssrf.js";
 import { loadUndiciRuntimeDeps } from "../infra/net/undici-runtime.js";
 
-/** MCP SDK-compatible fetch function type. */
-export type { FetchLike };
-
 /** Default MCP HTTP fetch backed by lazy-loaded undici runtime deps. */
 const fetchWithUndici: FetchLike = async (url, init) =>
   (await loadUndiciRuntimeDeps().fetch(