diff --git a/s3.js b/s3.js
deleted file mode 100644
index 8b7f136..0000000
--- a/s3.js
+++ /dev/null
@@ -1,30 +0,0 @@
-// s3.js
-require('dotenv').config();
-const { S3Client, PutObjectCommand } = require('@aws-sdk/client-s3');
-const { stringify } = require('csv-stringify/sync');
-
-const s3 = new S3Client({
-    region: process.env.AWS_REGION
-});
-
-/**
- * Uploads a CSV to s3://<bucket>/trends/<key>.csv with public-read ACL.
- * @param {string} key     Date key like '20250423'
- * @param {Array<Object>} rows  Array of DB rows to stringify into CSV
- * @returns {string} Public URL of the uploaded CSV
- */
-async function uploadTrendsCsv(key, rows) {
-    // Convert rows to CSV string (includes header)
-    const csv = stringify(rows, { header: true });
-    const cmd = new PutObjectCommand({
-        Bucket: process.env.S3_BUCKET_NAME,
-        Key: `trends/${key}.csv`,
-        Body: csv,
-        ContentType: 'text/csv',
-        ACL: 'public-read'
-    });
-    await s3.send(cmd);
-    return `${process.env.S3_BASE_URL}/${key}.csv`;
-}
-
-module.exports = { uploadTrendsCsv };