chore(deps): remove unused express dependency

adapters/functions/package.json

@@ -7,9 +7,7 @@
     "deploy": "vercel --prod",
     "vercel-build": "echo 'No build step required'"
   },
-  "dependencies": {
-    "express": "^4.19.2"
-  },
+  "dependencies": {},
   "devDependencies": {
     "@vercel/node": "^3.0.0"
   }

package.json

@@ -1,7 +1,4 @@
 {
-  "dependencies": {
-    "express": "^5.2.1"
-  },
   "devDependencies": {
     "@cloudflare/vitest-pool-workers": "^0.16.9",
     "@cloudflare/workers-types": "^4.20260329.1",

test/unit/package-manifest.test.js

@@ -6,10 +6,10 @@ describe('Package manifest', () => {
   it('does not depend on itself', () => {
     const require = createRequire(import.meta.url);
     const packageJson = require('../../package.json');
-    const { dependencies } = packageJson;
-    const typedDependencies = /** @type {Record<string, string> | undefined} */ (dependencies);
+    const typedPackageJson =
+      /** @type {{ dependencies?: Record<string, string>, name: string }} */ (packageJson);
 
-    expect(packageJson.name).toBe('xget');
-    expect(typedDependencies?.xget).toBeUndefined();
+    expect(typedPackageJson.name).toBe('xget');
+    expect(typedPackageJson.dependencies?.xget).toBeUndefined();
   });
 });