need to remove live-cd installer to boot into live mode

roles/netbootxyz/templates/menu/live-deepin.ipxe

@@ -18,7 +18,7 @@ goto live-boot
 
 :15-boot
 imgfree
-kernel ${kernel_url}vmlinuz boot=live fetch=${squash_url} union=overlay livecd-installer initrd=initrd
+kernel ${kernel_url}vmlinuz boot=live fetch=${squash_url} union=overlay initrd=initrd
 initrd ${kernel_url}initrd
 boot