Address comments

Author: minggangw

third_party/ref-napi/lib/ref.js

@@ -4,10 +4,9 @@ const inspect = require('util').inspect;
 const debug = require('debug')('ref');
 const os = require('os');
 // native_loader.js is an ES module (default export). When required from CJS,
-// Node returns the module namespace, so unwrap the default export.
+// Node returns the module namespace, so read the default export.
 const nativeLoader = require('../../../lib/native_loader.js');
-const addon =
-  nativeLoader && nativeLoader.default ? nativeLoader.default : nativeLoader;
+const addon = nativeLoader.default;
 
 if (!addon || !addon.ref) {
   throw new Error('Failed to load ref bindings from rclnodejs addon');