Revert "Merge pull request #71 from ncharles/ust_3426/dev/3428_add_a_file_with_promises_generation_timestamp"

This reverts commit eb23a0694b67c357314c4a1c331c6a08f9b24e55, reversing
changes made to f4506fa51a33761380ef9d28166b4411adfa2e38.