Post free upgrade deadline, how to remove "Get Windows 10" icon?

If you chose not to get the Windows spyware Windows 10 on 29 July, but did not click cancel the offer and let it lapse, then what now?

Windows 10 support says you can cancel the free offer but if you do not do this in time this option is now removed from their Get W10 App.

I realise there are answers on how to disable the icon, but I want to purge all the Windows 10 marketing AND preloads to free up my old small SSD that is creaking under the weight.

How do I make it as if this W10 never happened to W7?

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