Revert "Take s3key from body"

This reverts commit 4645c99.

backend/src/routes/file.ts

@@ -161,7 +161,7 @@ export class FileRoutes {
 
   putFile: RequestHandler = async (req, res, next) => {
     const file = req.body;
-
+    file.s3key = (req.params.s3key as unknown as string[]).join("/");
     file.updatedAt = new Date();
     if (!isFile(file))
       return next({ status: 422, errors: ["Request body is missing fields or has invalid values in them"] });