I found the above instructions but they seem to be for supported hardware , but I don’t think the H96x2 ever was.
I added dual boot to this box a few years back. I would like to remove the CE copy from the Box but can only find instructions on how to copy the CE from eMMc.
I have used putty to save the CE onto an sd card just to check I can get that far as not all the options are showing up 
What I need to know is there a command, instruction etc I can use to remove the files as it boots into CE from power on. I can get the Android by using the shutdown menu but I want to make CE sd card loading only.
option (7)