minor cleanups

removed clutter from models.py
(skill_ids only used for seeding)

ki/handlers/update_profile.py

@@ -152,10 +152,10 @@ def update_profile(user_id: int):
     profile.visible = request.json.get("visible", False)
 
     update_address(profile, request.json.get("address", {}))
-    update_contacts(profile, request.json.get("contacts", {}))
-    update_skills(profile, request.json.get("skills", {}))
-    update_searchtopics(profile, request.json.get("searchtopics"))
-    update_languages(profile, request.json.get("languages", {}))
+    update_contacts(profile, request.json.get("contacts", []))
+    update_skills(profile, request.json.get("skills", []))
+    update_searchtopics(profile, request.json.get("searchtopics", []))
+    update_languages(profile, request.json.get("languages", []))
 
     db.session.commit()