chore: Fix several style lints (#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

crates/workspace/src/status_bar.rs

@@ -121,7 +121,7 @@ impl StatusBar {
                 return Some(index + self.left_items.len());
             }
         }
-        return None;
+        None
     }
 
     pub fn insert_item_after<T>(