src: remove unused variable in node_dir.cc

PR-URL: https://github.com/nodejs/node/pull/30267
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

src/node_dir.cc

@@ -296,7 +296,6 @@ void AfterOpenDir(uv_fs_t* req) {
   }
 
   Environment* env = req_wrap->env();
-  Local<Value> error;
 
   uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);
   DirHandle* handle = DirHandle::New(env, dir);