Delete duplicate TODO

Author: ilevkivskyi

mypy/checker.py

@@ -2174,7 +2174,6 @@ def check_method_override_for_base_with_name(
         else:
             override_class_or_static = defn.func.is_class or defn.func.is_static
         typ, _ = self.node_type_from_base(defn, defn.info)
-        # TODO: defer if current node is a decorator that is not ready yet.
         assert typ is not None
 
         original_node = base_attr.node