Revert "Force synced KJT to trace unbacked SymInt (#107788)" (#108684)
This reverts commit 3b92ef814de4571a125294f2aa95843d7d2e2aea. So let's manually revert it instead.
(Not sure why the bot doesn't work on https://github.com/pytorch/pytorch/pull/107788)
Pull Request resolved: https://github.com/pytorch/pytorch/pull/108684
Approved by: https://github.com/ezyang
