model.hypothesis_strategies: Make metadata always none on origin_visit

This is not used. This is broken storage wise (origin-visit-add does not deal
correctly with it and it so happens there is no test around it).

And finally, this will soon go away with T2310.

swh/model/hypothesis_strategies.py

@@ -160,6 +160,7 @@ def origin_visits_d():
         status=sampled_from(["ongoing", "full", "partial"]),
         type=pgsql_text(),
         snapshot=optional(sha1_git()),
+        metadata=none(),
     )
 
 

[Phabricator Migration user]

Some references in the commit message have been migrated:

• T2310 is now swh/meta#2310 (closed)