Feature description

The AMP Stories editor is no longer compatible with the latest Gutenberg version (see #4200). For this reason and because work is underway on a new effort to create a standalone Stories plugin (see #4172), we need to sunset the AMP Stories editor in the AMP plugin.

The first part of this, as noted in #4074, we need to hide the Stories experience entirely (the experience checkboxes) if the user has no amp_story posts created. The thinking being that we can continue to allow access to Stories for users who are using them, but we discontinue offering the Stories feature for new installs or people who don't have stories created. In the place of the experience checkboxes, there can be a notice that says a new Stories plugin is coming and link to it when it is available for testing.

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry