Remove unnecessary community defaults

- All marketplace admins should be able to edit the logo, the categories, the custom fields, the terms of use, the privacy policy & the terms of use of their marketplaces, so the variables controlling these were removed
- "Feedback to admin" community default is still required, but the default was changed to "true".
Should you add `feedback_to_admin: 1` here, or is it true by default on database level?