When the user adds an answer it is possible to remove the answer by deleting its contents, but this is not intuitive. It also does not follow commonly understood patterns.
Follow the common pattern by providing an 'X' icon (button) to the right of each answer field that would have the following behaviors:
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Active
2.0
User interface
Makes Drupal easier to use. Preferred over UX, D7UX, etc.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Drupal core is now adding a "remove" button on multivalue field items. (Not sure if this was a thing 7 years ago 😁).
I have no objections to see how we can add the remove button to our entity. Would be great to update the validation logic then to also trigger a warning when you're deleting a poll choice which has votes.