As far as I know, you can't delete the parts node in Terragen once they've been imported into a scene. I guess the one in the main node window is one you've pasted there as a test.
I just did a quick experiment and edited the .tgd in a text editor:
Renamed the nodes B46_Void shader and parts node by adding the text "TO_DELETE" in a Terragen scene first
Then searched for those in the .tgd file and deleted these strings :
Quote<default_shader
name = "B46_Void shader TO_DELETE"
(terragen parameter list in between these lines)
>
</default_shader>
and:
Quote<object_part
name = "B46_Void TO_DELETE"
gui_use_node_pos = "1"
gui_node_pos = "400 180 0"
gui_group = ""
part = "B46_Void"
shader = "B46_Void shader TO_DELETE"
>
</object_part>
So basically the shader code for B46_Void bounded by
<default_shader (...) </default_shader>And the object part bounded by
<object_part (...) </object_part>Re-saved to a new .tgd file and the part is gone, don't how that will affect the scene without seeing the geo though.
I get into the habit now of checking and editing the .mtl file before I load it into Terragen