animatch: simplify cross compilation override

hosts/common/programs/animatch.nix

@@ -19,17 +19,7 @@
     packageUnwrapped = with pkgs; animatch.override {
       # allegro has no native wayland support, and so by default crashes when run without Xwayland.
       # enable the allegro SDL backend, and achieve Wayland support via SDL's Wayland support.
-      # TODO: switch to `allegro5.override { useSDL = true; }` once upstreamed:
-      # - <https://github.com/NixOS/nixpkgs/pull/429173>
-      allegro5 = allegro5.overrideAttrs (upstream: {
-        buildInputs = (upstream.buildInputs or []) ++ [
-          sdl2-compat
-        ];
-        cmakeFlags = (upstream.cmakeFlags or []) ++ [
-          "-DALLEGRO_SDL=on"
-        ];
-
-      });
+      allegro5 = allegro5.override { useSDL = true; };
     };
     # nativeBuildInputs = (upstream.nativeBuildInputs or []) ++ [
     #   makeWrapper