How do I disconnect nodes in the Shader Graph?

Well, the title pretty much explains it. How do I disconnect Nodes? Tried with combinations between ALT/CTRL/SHIFT + RMB/LMB while dragging over the input/output fields, but nothing works. I also find it very stupid that there is no Undo/Redo, because that can solve a lot of node connection mistakes. I know it’s in Preview version, but come on - the Undo/Redo is something you should start right from the beginning.

You select the wire, then hit Delete. Took me a few minutes to figure it out.