incus copy: keep type=none as single device info - fixes validation

Signed-off-by: Jan Hacker <[email protected]>

Author: schnoddelbotz

cmd/incus/copy.go

@@ -203,6 +203,7 @@ func (c *cmdCopy) copyInstance(conf *config.Config, sourceResource string, destR
 		for k, m := range deviceMap {
 			if m["type"] == "none" {
 				delete(entry.Devices, k)
+				entry.Devices[k] = map[string]string{"type": "none"}
 				continue
 			}
 
@@ -300,6 +301,7 @@ func (c *cmdCopy) copyInstance(conf *config.Config, sourceResource string, destR
 		for k, m := range deviceMap {
 			if m["type"] == "none" {
 				delete(entry.Devices, k)
+				entry.Devices[k] = map[string]string{"type": "none"}
 				continue
 			}