P2c: fix agent mock branch (clippy)

crates/zhila-daemon/src/agent.rs

@@ -261,8 +261,6 @@ fn mock_turn(text: &str) -> (String, Vec<Command>) {
             "Section B is where the room turns; I would open it.".into(),
             vec![Command::SelectSection { index: 1 }],
         )
-    } else if lower.contains("render") {
-        ("Rendering the arrangement.".into(), vec![Command::Render])
     } else {
         (
             "I am here, listening to the room. Ask me to move something, or press listen.".into(),
@@ -357,8 +355,6 @@ fn tools() -> Value {
 fn command_from_tool(name: &str, arguments: &str) -> Option<Command> {
     let args: Value = serde_json::from_str(arguments).unwrap_or(Value::Null);
     let vein = |value: &Value| serde_json::from_value::<VeinId>(value.clone()).ok();
-    let subject = |value: &Value| serde_json::from_value::<VeinId>(value.clone()).ok();
-    let _ = subject;
     match name {
         "play" => Some(Command::Play),
         "stop" => Some(Command::Stop),