libretro.beetle-snes: remove

Broken in master right now, not updated since 2022-04-06. Also, it is
based in a really old bsnes core (0.59), while we have lots of other
up-to-date alternatives in libretro (bsnes, bsnes-hd, bsnes-mercury).

Fixes: #263622

pkgs/applications/emulators/retroarch/cores.nix

···
     };
   };
 
-  beetle-snes = mkLibretroCore {
-    core = "mednafen-snes";
-    src = getCoreSrc "beetle-snes";
-    makefile = "Makefile";
-    meta = {
-      description = "Port of Mednafen's SNES core to libretro";
-      license = lib.licenses.gpl2Only;
-    };
-  };
-
   beetle-supafaust = mkLibretroCore {
     core = "mednafen-supafaust";
     src = getCoreSrc "beetle-supafaust";

pkgs/applications/emulators/retroarch/hashes.json

···
         "rev": "cd395e9e3ee407608450ebc565e871b24e7ffed6",
         "hash": "sha256-EIZRv1EydfLWFoBb8TzvAY3kkL9Qr2OrwrljOnnM92A="
     },
-    "beetle-snes": {
-        "owner": "libretro",
-        "repo": "beetle-bsnes-libretro",
-        "rev": "d770563fc3c4bd9abb522952cefb4aa923ba0b91",
-        "hash": "sha256-zHPtfgp9hc8Q4gXJ5VgfJLWLeYjCsQhkfU1T5RM7AL0="
-    },
     "beetle-supafaust": {
         "owner": "libretro",
         "repo": "supafaust",

pkgs/applications/emulators/retroarch/update_cores.py

···
     "beetle-pcfx": {"repo": "beetle-pcfx-libretro"},
     "beetle-psx": {"repo": "beetle-psx-libretro"},
     "beetle-saturn": {"repo": "beetle-saturn-libretro"},
-    "beetle-snes": {"repo": "beetle-bsnes-libretro"},
     "beetle-supafaust": {"repo": "supafaust"},
     "beetle-supergrafx": {"repo": "beetle-supergrafx-libretro"},
     "beetle-vb": {"repo": "beetle-vb-libretro"},