remove unneeded dependencies

protobuf/Cargo.toml

@@ -9,5 +9,4 @@ actix-web.workspace = true
 
 env_logger.workspace = true
 log.workspace = true
-prost = "0.11"
-prost-derive = "0.11"
+prost = { version = "0.11", features = ["prost-derive"] }

protobuf/src/main.rs

@@ -1,6 +1,6 @@
 use actix_protobuf::{ProtoBuf, ProtoBufResponseBuilder as _};
 use actix_web::{middleware, web, App, HttpResponse, HttpServer, Result};
-use prost_derive::Message;
+use prost::Message;
 
 #[derive(Clone, PartialEq, Eq, Message)]
 pub struct MyObj {