revert multi region

[codecov[bot]]

Codecov Report

Base: 77.53% // Head: 77.40% // Decreases project coverage by -0.13% :warning:

Coverage data is based on head (aa5a48e) compared to base (3ffeb02). Patch coverage: 88.88% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #420 +/- ## ========================================== - Coverage 77.53% 77.40% -0.14% ========================================== Files 124 123 -1 Lines 9634 9571 -63 ========================================== - Hits 7470 7408 -62 + Misses 2164 2163 -1 ``` | [Impacted Files](https://codecov.io/gh/qiniu/objc-sdk/pull/420?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu) | Coverage Δ | | |---|---|---| | [QiniuSDK/Common/QNZone.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvQ29tbW9uL1FOWm9uZS5t) | `50.00% <ø> (-25.00%)` | :arrow_down: | | [QiniuSDK/Common/QNZoneInfo.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvQ29tbW9uL1FOWm9uZUluZm8ubQ==) | `91.48% <ø> (+0.26%)` | :arrow_up: | | [QiniuSDK/Common/QNAutoZone.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvQ29tbW9uL1FOQXV0b1pvbmUubQ==) | `87.69% <83.33%> (ø)` | | | [QiniuSDK/Common/QNFixedZone.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvQ29tbW9uL1FORml4ZWRab25lLm0=) | `17.27% <100.00%> (ø)` | | | [QiniuSDK/Storage/QNBaseUpload.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvU3RvcmFnZS9RTkJhc2VVcGxvYWQubQ==) | `84.84% <100.00%> (-0.26%)` | :arrow_down: | | [...SDK/Http/Request/HttpClient/QNUploadSystemClient.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvSHR0cC9SZXF1ZXN0L0h0dHBDbGllbnQvUU5VcGxvYWRTeXN0ZW1DbGllbnQubQ==) | `93.47% <0.00%> (-4.35%)` | :arrow_down: | | [...niuSDK/Http/NetworkStatus/QNNetworkStatusManager.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvSHR0cC9OZXR3b3JrU3RhdHVzL1FOTmV0d29ya1N0YXR1c01hbmFnZXIubQ==) | `91.83% <0.00%> (-1.03%)` | :arrow_down: | | [QiniuSDK/Storage/QNUpToken.m](https://codecov.io/gh/qiniu/objc-sdk/pull/420/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu#diff-UWluaXVTREsvU3RvcmFnZS9RTlVwVG9rZW4ubQ==) | `86.27% <0.00%> (+1.96%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qiniu)

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