LibWeb: Use the WRAPPER_HACK() macro instead of hand-coding wrap()

This macro will soon go away, but let's start by replacing all the
hand-coded versions of wrap() with this macro that expands to the same
exact thing.

Userland/Libraries/LibWeb/HTML/PromiseRejectionEvent.h

@@ -42,7 +42,4 @@ private:
 
 }
 
-namespace Web::Bindings {
-inline JS::Object* wrap(JS::Realm&, Web::HTML::PromiseRejectionEvent& object) { return &object; }
-using PromiseRejectionEventWrapper = Web::HTML::PromiseRejectionEvent;
-}
+WRAPPER_HACK(PromiseRejectionEvent, Web::HTML)