无用代码清理

[ShiinaOrez]

清理models
删掉auth.py verify

[ShiinaOrez]

Actually, when I delete THESE models like: Group, File...
Because of "User" have the foreign_key of THESE models, when I try to use User.query.... I will get the BUGS....

And the "@staticmethod" can't be delete, because of @staticmethod, we can use "+" with INT and INT, not INT and BASEQUERY.

@Humbertzhang