Update unlink.md guide (#16268)

docs/guides/write-file/unlink.md

@@ -2,22 +2,10 @@
 name: Delete a file
 ---
 
-To synchronously delete a file with Bun, use the `unlinkSync` function from the [`node:fs`](https://nodejs.org/api/fs.html#fs_fs_unlink_path_callback) module. (Currently, there is no `Bun` API for deleting files.)
+To delete a file in Bun, use the `delete` method.
 
 ```ts
-import { unlinkSync } from "node:fs";
+import { file } from "bun";
 
-const path = "/path/to/file.txt";
-unlinkSync(path);
-```
-
----
-
-To remove a file asynchronously, use the `unlink` function from the [`node:fs/promises`](https://nodejs.org/api/fs.html#fs_fspromises_unlink_path) module.
-
-```ts
-import { unlink } from "node:fs/promises";
-
-const path = "/path/to/file.txt";
-await unlink(path);
+await file("./path-to-file.txt").delete();
 ```