i want to deactivate it completly all of it
The last I’ve heard, once you’ve added ECom, even support cannot remove it. The only thing you can do is copy-paste rebuild your site without it.
If your goal is just to remove all of the pages from a site-visitor perspective, you can just delete all of your products, categories, etc, but the left-side nav will still show those features.
Other pages like /checkout likely cannot be turned off but you may be able to 301 redirect them.
Micheal is right (unless they recently changed it).
Seeing that you only have 2 pages here, I would definitely recommend starting a new site.
Even if you set up redirects, having eCom enabled will slow your page load times forever on that site, so better to move now than later.