How to Remove a Branch from the Middle of the Hierarchy?

I have a Team Project created with the "Standard" branch pattern from the ALM Rangers' Branching guidance:

After creating it, I found that I only really needed the "Basic" pattern. That is, I don't need the "Service Pack" branch.

Is there a way for me to remove the "Service Pack" branch and "heal" the hierarchy so that "Release" is under "Main" in the hierarchy? Right now, every changeset in the "Service Pack" hierarchy has a corresponding changeset in the "Release" hierarchy, as "Service Pack" has just been in the way.