refactor: inline room.fromJSON

server/create-server-room.js

@@ -561,8 +561,7 @@ for (let i = 0; i < 5; ++i) {
 }
 
 export function createRoom() {
-  const room = new Room();
-  room.fromJSON(roomJSON);
+  const room = new Room(roomJSON);
   room.world = new World();
   return room;
 }