src: apply clang-tidy readability-delete-null-pointer

PR-URL: nodejs#26813
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

src/js_native_api_v8.cc

@@ -395,9 +395,7 @@ struct CallbackBundle {
  // This will be called when the v8::External containing `this` pointer
  // is being GC-ed.
  CallbackBundle* bundle = info.GetParameter();
- if (bundle != nullptr) {
- delete bundle;
- }
+ delete bundle;
  }
 };