refactor(test): avoid async if no needed

packages/vm/tests/integration/request.test.ts

@@ -1,32 +1,32 @@
 /**
  * @jest-environment ../jest-environment/dist
  */
-test('evaluate promise', async () => {
+test('evaluate promise', () => {
   const url = 'https://vercel.com/foo/bar?one=value'
   const req = new Request(url)
   expect(req.url).toEqual(url)
 })
 
-test('parses and reconstructs the URL alone', async () => {
+test('parses and reconstructs the URL alone', () => {
   const url = 'https://vercel.com/foo/bar?one=value'
   const req = new Request(url)
   expect(req.url).toEqual(url)
 })
 
-test('throws when the URL is malformed', async () => {
+test('throws when the URL is malformed', () => {
   try {
     void new Request('meeeh')
   } catch (error: any) {
     expect(error.message).toEqual('Failed to parse URL from meeeh')
   }
 })
 
-test('Request.referrer is `about:client` by default', async () => {
+test('Request.referrer is `about:client` by default', () => {
   const request = new Request('https://example.vercel.sh')
   expect(request.referrer).toEqual('about:client')
 })
 
-test('Request.referrer can be customized', async () => {
+test('Request.referrer can be customized', () => {
   const request = new Request('https://example.vercel.sh', {
     referrer: 'https://vercel.com/home',
   })