chore: fix two clippy warnings

Drop the no-op drop(stored) of a &mut reference in profiles.rs and stop
binding the unused ProfileSummary returned by app.undo_delete() in the
IPC UndoDelete handler. Clippy --all-targets is now warning-free.

src/ipc.rs

@@ -557,7 +557,7 @@ async fn run_with_app(app: &mut App, request: Request) -> Result<serde_json::Val
             Ok(json!(app.state_view()))
         }
         Request::UndoDelete => {
-            let restored = app.undo_delete()?;
+            app.undo_delete()?;
             app.save_vault()?;
             Ok(json!(app.state_view()))
         }

src/profiles.rs

@@ -247,7 +247,6 @@ pub fn set_profile_picture(
         stored.picture.clone(),
         stored.nip05.clone(),
     );
-    drop(stored);
     let summary = ProfileSummary {
         label,
         npub,