Removes the websocket support from wasix.
Websockets are a high level concept.
They should not be integrated so deeply into the core of wasix.
For client connections, we will want to add support for websocket
clients into the custom wasix_http_client bindings.
For servers, the support should go into the custom wcgi server bindings.
Deletes a tokio + tungstenite based Websocket implementation in the wasi
crate.
The file wasn't even included in the module tree.
The code is moved to the wasmer-sys-utils crate, but commented out at
the moment.
Should probably just be removed.
