Revert "Use alt CDN URL when request header is passed (#4921)" (#4923)

This reverts commit 609e3896eb.

apps/labrinth/src/file_hosting/mod.rs

@@ -1,12 +1,10 @@
 use async_trait::async_trait;
 use thiserror::Error;
 
-mod cdn;
 mod mock;
 mod s3_host;
 
 use bytes::Bytes;
-pub use cdn::*;
 pub use mock::MockHost;
 pub use s3_host::{S3BucketConfig, S3Host};