Similar to https://phabricator.wikimedia.org/T342001, we want to remove license references so it's added to the Terms of Use (defined by the Wikibase owner) and not hard-coded by us.

AC:

• Remove ", and you irrevocably agree to release your contribution under the [ None yet set.]." and add a . after "terms of use" in the pop-up contributors see the first time they edit a statement on a Wikibase.