fix(reflection, health): Remove transport feature (#1112)

tonic-health/README.md

@@ -7,4 +7,8 @@ Please follow the example in the [main repo](https://github.com/hyperium/tonic/t
 ## Features
 
 - transport: Provides the ability to set the service by using the type system and the
-`NamedService` trait.
+`NamedService` trait. You can use it like that:
+```rust
+    let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
+    let client = HealthClient::new(conn);
+```