How to delete a control point on the rigging tool?

It may be super obvious for you, but I find it very confusing. How do I delete control points on the rigging tool? I found in the official guide that “Alt + left click” puts controls on a deformation chain but how can I get rid of them?

  1. Have both the Camera and Network views open side by side.
  2. Expand the Deformer Group in the Network View window.
  3. In the Camera View window click on the point you wish to delete using the Transform Tool. The corresponding item will be highlighted in the Network View window.
  4. Click on the highlighted module in the Network View window.
  5. Hit Delete.

Hitting Delete in the Camera View would be sensible…but that does not work for some reason.