fix(hive-ag3nt): drop attribute orphaned by now_unix removal

hive-ag3nt/src/serve_common.rs

@@ -45,9 +45,6 @@ pub fn format_wake_prompt(
     format!("{banner}{tag}Incoming message from `{from}`:\n---\n{body}\n---{pending}")
 }
 
-/// Current time as a Unix timestamp (seconds). Returns 0 on any error.
-#[must_use]
-
 /// Field-named args for [`build_row`]. Mirrors the turn-stats row
 /// columns; `outcome` and `bus` borrow for the duration of the call.
 pub struct TurnRowArgs<'a> {