Remove empty if-let leftover from debug instrumentation removal

Co-Authored-By: Oz <oz-agent@warp.dev>

Author: cephalonaut

app/src/pane_group/child_agent/hydration.rs

@@ -142,8 +142,6 @@ impl PaneGroup {
         let materialization = task_for_decision
             .as_ref()
             .map(decide_child_pane_materialization);
-        if let Some(ref task) = task_for_decision {
-        }
 
         match origin {
             ChildPaneOrigin::HostedConversation => {