chore: remove streamable http

Author: 4t145

crates/rmcp/src/transport.rs

@@ -67,7 +67,6 @@ pub use sse_server::SseServer;
 // #[cfg(feature = "transport-ws")]
 // pub mod ws;
 
-pub mod streamable_http;
 pub trait IntoTransport<R, E, A>: Send + 'static
 where
     R: ServiceRole,