`socket.rs` is a trivial pass-through that adds nothing

The entire file is a single function that just forwards its arguments
hint: Inline this call into `ws_handler` in `lib.rs` (which is its only caller) and delete socket.rs.

Start with socket.rs and its only caller, ws_handler in lib.rs, to trace the pass-through call and its arguments. The work is done when the call is handled in ws_handler, socket.rs is deleted, and the project still builds successfully.

Written by the indexing model from the issue text.