Mark Haxe GDExtension bindings as archived (#10330)

* Completely remove reference to Haxe bindings

Consensus is that this link should be removed, not just moved to an
archived section.

about/list_of_features.rst

@@ -490,7 +490,7 @@ Scripting
    - Use any build system and language features you wish.
 
 - Actively developed GDExtension bindings for `D <https://github.com/godot-dlang/godot-dlang>`__,
-  `Haxe <https://hxgodot.github.io/>`__, `Swift <https://github.com/migueldeicaza/SwiftGodot>`__, and `Rust <https://github.com/godot-rust/gdextension>`__
+  `Swift <https://github.com/migueldeicaza/SwiftGodot>`__, and `Rust <https://github.com/godot-rust/gdextension>`__
   bindings provided by the community. (Some of these bindings may be experimental and not production-ready).
 
 Audio