Zillion: remove rom requirement for generation (#2875)

* in the middle of work towards no rom for generation (not working)

* no rom needed for Zillion generation

* revert core changes

worlds/zillion/gen_data.py

@@ -0,0 +1,35 @@
+from dataclasses import dataclass
+import json
+from typing import Dict, Tuple
+
+from zilliandomizer.game import Game as ZzGame
+
+
+@dataclass
+class GenData:
+    """ data passed from generation to patcher """
+
+    multi_items: Dict[str, Tuple[str, str]]
+    """ zz_loc_name to (item_name, player_name) """
+    zz_game: ZzGame
+    game_id: bytes
+    """ the byte string used to detect the rom """
+
+    def to_json(self) -> str:
+        """ serialized data from generation needed to patch rom """
+        jsonable = {
+            "multi_items": self.multi_items,
+            "zz_game": self.zz_game.to_jsonable(),
+            "game_id": list(self.game_id)
+        }
+        return json.dumps(jsonable)
+
+    @staticmethod
+    def from_json(gen_data_str: str) -> "GenData":
+        """ the reverse of `to_json` """
+        from_json = json.loads(gen_data_str)
+        return GenData(
+            from_json["multi_items"],
+            ZzGame.from_jsonable(from_json["zz_game"]),
+            bytes(from_json["game_id"])
+        )