add mis-deleted comment back

Author: shuoweil

bigframes/dataframe.py

@@ -783,6 +783,8 @@ def __repr__(self) -> str:
 
         opts = bigframes.options.display
         max_results = opts.max_rows
+        # anywdiget mode uses the same display logic as the "deferred" mode
+        # for faster execution
         if opts.repr_mode in ("deferred", "anywidget"):
             return formatter.repr_query_job(self._compute_dry_run())