Deleting Unused Closed Branches To Clear Storage

Is there a way to delete unused branches that are closed. Because, even though they are closed, it seems as if it is the main reason for storage. It could be assets as well, but I think deleting the branches would also help to decrease the amount of space the project takes up.

Link To Editor: https://playcanvas.com/editor/scene/763958

You can see that I deleted almost all of my builds (except my current one), but it still says that 100mb is being taken up, even though the current build takes up 100mb less than the amount shown.

Right now there is no way to delete branches, which is quite unfortunate because indeed they tend to fill up space.

@will may be able to step in and help you out with this.