Posted by cantcode on Jul 16, 2013; 3:19pm
URL: https://forum.librecad.org/How-to-delete-multiple-layers-in-one-shot-tp5708573p5708574.html

U could try to:
1. hihde the layer you want to keep (press the eye icon for this layer)
2. Select->Select All (Ctrl + A)
3. Delete (press Del key)

you should still have the layers but they should be empty