amp-animation imported when not used, breaking AMP compatibility

[amedina]

Report from user: I tried the Story ad creation tool today, it's very easy to use! I checked the downloaded zip of a simple story ad out and realized that amp-animation custom element is imported even when it isn't used. This will break amp validity and reject upload in DV360. Can we possibly address this?

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Acceptance Criteria

Implementation Brief

[divyarajmasani]

A fix for the issue has been pushed and available on

https://rtcamp.github.io/web-stories-wp/

[mohdsayed]

We were able to fix the issue and I verified the markup with and without animation added on google ad manager's new creative, and it shows a valid AMP markup now! Though I do not know how to test it out in DV360