Remove "SciPioneer" from PT Distributed code owners (#65862)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/65862
ghstack-source-id: 139378782
Test Plan: N/A
Reviewed By: rohan-varma
Differential Revision: D31291340
fbshipit-source-id: 65d6a82c57dd50d8a4241e9442d73002590989d9