Issue 848 : Change 'AMP Settings' page with canonical AMP.
Issue 848 : Change 'AMP Settings' page with canonical AMP.

If the theme registers support for canonical AMP,
Check all of the post types in the 'AMP Settings' page.
And disable their <input>, as the theme will render the post types.
Also, change the description at the bottom.
And don't output the 'submit' button in canonical mode.

ampproject/amp-toolbox-php,ampproject/amp-toolbox-php