refactor: defer Noise reset construction to responder

Co-authored-by: Codex noreply@openai.com

Author: viyatb-oai

codex-rs/exec-server/src/relay.rs

@@ -24,7 +24,6 @@ use crate::connection::JsonRpcTransport;
 use crate::relay_proto::RelayData;
 use crate::relay_proto::RelayHandshake;
 use crate::relay_proto::RelayMessageFrame;
-use crate::relay_proto::RelayReset;
 use crate::relay_proto::RelayResume;
 use crate::relay_proto::relay_message_frame;
 use crate::server::ConnectionProcessor;
@@ -83,16 +82,6 @@ impl RelayMessageFrame {
         }
     }
 
-    pub(crate) fn reset(stream_id: String, reason: String) -> Self {
-        Self {
-            version: RELAY_MESSAGE_FRAME_VERSION,
-            stream_id,
-            ack: 0,
-            ack_bits: 0,
-            body: Some(relay_message_frame::Body::Reset(RelayReset { reason })),
-        }
-    }
-
     /// Validate cleartext routing metadata before a frame reaches either the
     /// direct JSON-RPC parser or the Noise relay state machine.
     ///