Fix another bug

src/js/game/components/item_producer.js

@@ -1,14 +1,7 @@
-import { types } from "../../savegame/serialization";
 import { Component } from "../component";
 
 export class ItemProducerComponent extends Component {
     static getId() {
         return "ItemProducer";
     }
-
-    static getSchema() {
-        return {
-            type: types.string,
-        };
-    }
 }