refactor: Some minor refinements

scrape/parse/archived/v1_v2.ts

@@ -1,5 +1,3 @@
-import fs from "fs/promises"
-
 const CLASSES: string[] = [
   "A1a", "A1b", "A1c", "C1a", "C1b", "C1c", "A2", "C2a", "C2b", "C2c", "E2", "C3a", "C3b", "C3c", "E3"
 ];
@@ -73,8 +71,5 @@ export default async function generateArchivedV1_V2() {
     data.schedule.push(d);
   }
 
-  await Promise.all([
-    fs.writeFile("volume/db/v1.json", JSON.stringify(data, null, 2)),
-    fs.writeFile("volume/db/v2.json", JSON.stringify(data, null, 2)),
-  ]);
+  return data;
 }