LibWeb: Make DOMTokenList GC-allocated

Author: https://github.com/awesomekling
Commit: 0176d42f49
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

@@ -471,7 +471,6 @@ class DOMPointReadOnlyWrapper;
 class DOMRectListWrapper;
 class DOMRectReadOnlyWrapper;
 class DOMRectWrapper;
-class DOMTokenListWrapper;
 class ElementWrapper;
 class ErrorEventWrapper;
 class EventListenerWrapper;