diff --git a/src/runtime/src/comms.rs b/src/runtime/src/comms.rs
index ca963ef..86fac79 100644
--- a/src/runtime/src/comms.rs
+++ b/src/runtime/src/comms.rs
@@ -78,12 +78,6 @@ enum Reply {
     ClockFailure = 15,
 }
 
-async fn write_chunk(stream: &TcpStream, chunk: &[u8]) -> Result<()> {
-    write_i32(stream, chunk.len() as i32).await?;
-    stream.send(chunk.iter().copied()).await?;
-    Ok(())
-}
-
 async fn write_header(stream: &TcpStream, reply: Reply) -> Result<()> {
     stream.send([0x5a, 0x5a, 0x5a, 0x5a, reply.to_u8().unwrap()].iter().copied()).await?;
     Ok(())
diff --git a/src/runtime/src/proto_async.rs b/src/runtime/src/proto_async.rs
index 5188fc3..366eb78 100644
--- a/src/runtime/src/proto_async.rs
+++ b/src/runtime/src/proto_async.rs
@@ -123,4 +123,3 @@ pub async fn write_chunk(stream: &TcpStream, value: &[u8]) -> Result<()> {
     stream.send(value.iter().copied()).await?;
     Ok(())
 }
-