test(integration): drop pre-installed @cfworker/json-schema from CF Workers test

PR #2088 adds @cfworker/json-schema to noExternal so the validator is
bundled into the published @modelcontextprotocol/server tarball. The
Cloudflare Workers integration test was still installing the package
as a direct dep in the generated consumer package.json, which masked
any future re-externalization regression — wrangler would resolve the
bare import from the test's own install instead of failing.

Removing the dep turns the test into a true regression guard that the
bundle is genuinely self-contained, matching the migration docs.

Closes the last open review thread on #2088.

Author: mattzcarey

test/integration/test/server/cloudflareWorkers.test.ts

@@ -42,8 +42,7 @@ describe('Cloudflare Workers compatibility (no nodejs_compat)', () => {
             private: true,
             type: 'module',
             dependencies: {
-                '@modelcontextprotocol/server': `file:./${tarballName}`,
-                '@cfworker/json-schema': '^4.1.1'
+                '@modelcontextprotocol/server': `file:./${tarballName}`
             },
             devDependencies: {
                 wrangler: '^4.14.4'