LibWeb: Make WorkerNavigator GC-allocated

Author: https://github.com/awesomekling
Commit: 2fe97fa8db
Pull-request: https://github.com/SerenityOS/serenity/pull/14816
Reviewed-by: https://github.com/ADKaster
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibWeb/Forward.h

@@ -453,7 +453,6 @@ class LocationObject;
 class OptionConstructor;
 class RangePrototype;
 class WindowProxy;
-class WorkerNavigatorWrapper;
 class Wrappable;
 class Wrapper;
 class XMLHttpRequestPrototype;