diff --git a/packages/backend/src/misc/is-quote.ts b/packages/backend/src/misc/is-quote.ts
deleted file mode 100644
index fe83a56a55..0000000000
--- a/packages/backend/src/misc/is-quote.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-import type { Note } from "@/models/entities/note.js";
-
-export default function (note: Note): boolean {
-	return (
-		note.renoteId != null &&
-		(note.text != null ||
-			note.hasPoll ||
-			(note.fileIds != null && note.fileIds.length > 0))
-	);
-}