[behavior][XWALK-3119] Remove 2 subcases for CSP in behavior

- Due to tinyweb dose not support access origin now, remove related subcases firstly.

Impacted TCs num: New 0, Update 0, Delete 2
Unit test Platform: [Tizen-IVI]
Unit test result summary: Pass 0, Fail 0, Blocked 0
Merge pull request #1525 from JianfengXu/csp/3119

[behavior][XWALK-3119] Remove 2 subcases for CSP in behavior