Delete all user data with user delete function

[kordless]

When a user deletes the account, delete all the tables and other data related.

[kordless]

This got done at some point in auth.py.

@classmethod
def remove_by_uid(cls, uid):
	with ndb.Client().context():
		user = cls.query(cls.uid == uid).get()
		if user:
			user.key.delete() 
		else:
			return False
		return True