Backport PR #36595 on branch 1.1.x (Partial Revert "ENH: infer freq in timedelta_range (#32377)")
Backport PR #36595: Partial Revert "ENH: infer freq in timedelta_range (#32377)"
failure unrelated. see https://github.com/pandas-dev/pandas/pull/36396#issuecomment-695195148