[Work Item] Remove old script version instead of rename to .old

**Describe the work**
Because `.old` will be prior to `.ps1` when trying to tab complete the script name after an update, you will run into the `.old` version first. It was requested to just remove the old version of the file instead or we can just rename the file to a different ending like maybe `.ps1.old` instead to keep it around if we want to. 
