docs: remove feature protobuf-codec

Tim-Zhang · Tim-Zhang · commit 9723efb33b62 · 2023-09-14T11:37:51.000+08:00
Which does not exist anymore.

Signed-off-by: Tim Zhang &lt;tim@hyper.sh&gt;
diff --git a/src/lib.rs b/src/lib.rs
@@ -24,7 +24,6 @@
 //!
 //! - `async`: Enables async server and client.
 //! - `sync`: Enables traditional sync server and client (default enabled).
-//! - `protobuf-codec`: Includes rust-protobuf (default enabled).
 //!
 //! # Socket address
 //!
