Revert "Add groups to dynamo benchmarking output data (#103268)"
This reverts commit 455f542ed95921a073b7859fc51a3a1e7c361239.
Reverted https://github.com/pytorch/pytorch/pull/103268 on behalf of https://github.com/drisspg due to no longer needed ([comment](https://github.com/pytorch/pytorch/pull/103268#issuecomment-1591732331))
