[torch/distributed] remove outdated FutureWarning in distributed/elastic/util/store.py (#60807)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/60807
Addresses: https://github.com/pytorch/pytorch/issues/60717
This warning should have been removed since this code is no longer in "experimental" mode.
Test Plan: N/A - just removing experimental warning that should've been removed.
Reviewed By: H-Huang, aivanou
Differential Revision: D29412972
fbshipit-source-id: 16a8a98abde70a4ae0c1ac1b14bda339cb44863a
