hive-agent: remove dead bash-task- wake_from special-case

The #2595 job-queue rework replaced hive-bash-mcp's direct broker send
with a todo push through the in-agent socket, so a bash-task-driven
turn now wakes with from == "todo", never "bash-task-<id>". This
branch has had nothing to match since, so it silently bucketed no
turns under the bash-task label; removed rather than left dead.

Closes #2256.

hive-agent/src/serve_common.rs

@@ -102,11 +102,6 @@ pub fn build_row(args: TurnRowArgs<'_>) -> TurnStatRow {
         Err(TurnError::ApiStall) => ("api_stall", None),
         Err(TurnError::Failed(e)) => ("failed", Some(format!("{e:#}"))),
     };
-    let wake_from = if wake_from.starts_with("bash-task-") {
-        "bash-task".to_owned()
-    } else {
-        wake_from
-    };
     TurnStatRow {
         started_at,
         ended_at,