Remove warning status in CI tests

[YuLiu98]

Describe Current Status and Possible Solution

Now the CI tests have three statuses: OK, WARNING, and ERROR.

However, we cannot realize the occurrence of the WARNING status, unless we click the button in the PR page and check the integrated tests in detail, which causes the accumulation of tests with the WARNING status.

So. I suggest removing the WARNING status in order to make sure no warnings are introduced by PRs.

Additional Context

No response

[hongriTianqi]

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