src: remove redundant cast in node_dir.cc

PR-URL: #30747
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

src/node_dir.cc

@@ -320,7 +320,7 @@ static void OpenDir(const FunctionCallbackInfo<Value>& args) {
 
   const enum encoding encoding = ParseEncoding(isolate, args[1], UTF8);
 
-  FSReqBase* req_wrap_async = static_cast<FSReqBase*>(GetReqWrap(env, args[2]));
+  FSReqBase* req_wrap_async = GetReqWrap(env, args[2]);
   if (req_wrap_async != nullptr) {  // openDir(path, encoding, req)
     AsyncCall(env, req_wrap_async, args, "opendir", encoding, AfterOpenDir,
               uv_fs_opendir, *path);