Import DataDoctor > Design Intent Modification Tools > Cut, Copy, Paste, and Delete > To Delete Geometry in IDD
  
To Delete Geometry in IDD
1. Select one or more nodes on the GTS Tree. You can also select one or more surfaces, curves, one-sided edges, or datums in the graphics window or on the GTS tree.
2. Right-click the selected geometry and click Delete. You can also press the DELETE key. The selected geometry is deleted.