refactor: replace `deferred()` from `std/async` with `Promise.withResolvers()` (#21234)

Closes #21041

---------

Signed-off-by: Asher Gomez <ashersaupingomez@gmail.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/cli/tests/testdata/run/tls_starttls.js b/cli/tests/testdata/run/tls_starttls.js
index ecf344211..4acc21461 100644
--- a/cli/tests/testdata/run/tls_starttls.js
+++ b/cli/tests/testdata/run/tls_starttls.js
@@ -1,4 +1,3 @@
-import { deferred } from "../../../../test_util/std/async/deferred.ts";
 import {
   assert,
   assertEquals,
@@ -10,7 +9,7 @@ import { TextProtoReader } from "./textproto.ts";
 const encoder = new TextEncoder();
 const decoder = new TextDecoder();
 
-const resolvable = deferred();
+const { promise, resolve } = Promise.withResolvers();
 const hostname = "localhost";
 const port = 3504;
 
@@ -33,7 +32,7 @@ listener.accept().then(
     // TODO(bartlomieju): this might be a bug
     setTimeout(() => {
       conn.close();
-      resolvable.resolve();
+      resolve();
     }, 0);
   },
 );
@@ -64,6 +63,6 @@ await r.readFull(bodyBuf);
 assertEquals(decoder.decode(bodyBuf), "Hello World\n");
 conn.close();
 listener.close();
-await resolvable;
+await promise;
 
 console.log("DONE");