Maximum font size not working with Heading block

[priethor]

Bug Description

The maximum font size settings set to a Heading block are not applied

Expected Behaviour

When browsing the edited page from a mobile device, the text should fit in the screen, with a font size smaller than the maximum specified in the AMP settings.

Steps to reproduce

1. Select a Heading block
2. Enable AMP Settings
3. Set a max font size smaller than the normal font size
4. The AMP max font size doesn't apply and the Heading block spans two lines, as in the following screenshot

Screenshots

Additional context

• WordPress version: 5.5.3
• Plugin version: 2.0.7
• Gutenberg plugin version (if applicable): 9.5.0
• Browser: Chrome, Firefox

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Acceptance criteria

Implementation brief

QA testing instructions

Demo

Changelog entry

[westonruter]

Are you referring to the “Automatically fit text to container” setting, like:

If so, we're actually planning on deprecate and remove this feature due to it not currently working on non-AMP pages and also that it is too low-level. It's more relevant when the text is programmatically supplied rather than being manually entered. See #4557 (comment).

[priethor]

Are you referring to the “Automatically fit text to container” setting, like:

Yes, that's the one I was referring to.

[westonruter]

OK, please disregard that feature for now. We'll be deprecating/removing it.

[westonruter]

Closing in favor of #4557.