minor cleanups

removed clutter from models.py
(skill_ids only used for seeding)
changed default value of update_profile handler
(caused a crash during testing)

ki/models.py

@@ -139,13 +139,6 @@ class Address(db.Model):
 
 
 class Skill(db.Model):
-    skill_id_php = 1
-    skill_id_python = 3
-    skill_id_sqlalchemy = 7
-    skill_id_mysql = 9
-    skill_id_postgresql = 10
-    skill_id_sqlite = 11
-
     __tablename__ = "skill"
 
     id = Column(Integer, primary_key=True)