src: remove the unused PackageConfig class

PR-URL: #45478
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Akhil Marsonya <akhil.marsonya27@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: joyeecheung

src/env.h

@@ -93,24 +93,6 @@ class Worker;
 
 namespace loader {
 class ModuleWrap;
-
-struct PackageConfig {
-  enum class Exists { Yes, No };
-  enum class IsValid { Yes, No };
-  enum class HasMain { Yes, No };
-  enum class HasName { Yes, No };
-  enum PackageType : uint32_t { None = 0, CommonJS, Module };
-
-  const Exists exists;
-  const IsValid is_valid;
-  const HasMain has_main;
-  const std::string main;
-  const HasName has_name;
-  const std::string name;
-  const PackageType type;
-
-  v8::Global<v8::Value> exports;
-};
 }  // namespace loader
 
 class Environment;