Replace Time refinement with Timer Util

[dduugg]

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew typecheck with your changes locally?
• Have you successfully run brew tests with your changes locally?

---

Refinements are problematic for reasons covered in past PRs. This PR removes one of the two remaining refinements (Time) in favor of static Utils methods.

[MikeMcQuaid]

Looks good, thanks again @dduugg!