fix: collapse nested if for clippy collapsible_if lint

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: 2 people

src/daft-io/src/google_cloud.rs

@@ -324,10 +324,10 @@ impl GCSClientWrapper {
             }
         };
 
-        if is_success {
-            if let Some(is) = io_stats.as_ref() {
-                is.mark_delete_requests(1);
-            }
+        if is_success
+            && let Some(is) = io_stats.as_ref()
+        {
+            is.mark_delete_requests(1);
         }
         Ok(())
     }