fs: remove unnecessary Function#bind() in fs/promises

PR-URL: #35208
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Masashi Hirano <shisama07@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

lib/internal/fs/promises.js

@@ -431,7 +431,7 @@ async function rename(oldPath, newPath) {
 
 async function truncate(path, len = 0) {
   const fd = await open(path, 'r+');
-  return ftruncate(fd, len).finally(fd.close.bind(fd));
+  return ftruncate(fd, len).finally(fd.close);
 }
 
 async function ftruncate(handle, len = 0) {