remove conf package

[codecov[bot]]

Codecov Report

Base: 31.08% // Head: 15.33% // Decreases project coverage by -15.76% :warning:

Coverage data is based on head (a9f9b3a) compared to base (0167576). Patch coverage: 15.90% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev-3.0.0 #195 +/- ## ============================================== - Coverage 31.08% 15.33% -15.76% ============================================== Files 1 6 +5 Lines 370 1435 +1065 ============================================== + Hits 115 220 +105 - Misses 216 1167 +951 - Partials 39 48 +9 ``` | [Impacted Files](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS) | Coverage Δ | | |---|---|---| | [client/channel.go](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS#diff-Y2xpZW50L2NoYW5uZWwuZ28=) | `0.00% <0.00%> (ø)` | | | [client/config.go](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS#diff-Y2xpZW50L2NvbmZpZy5nbw==) | `0.00% <ø> (ø)` | | | [client/connection.go](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS#diff-Y2xpZW50L2Nvbm5lY3Rpb24uZ28=) | `35.45% <ø> (ø)` | | | [client/json.go](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS#diff-Y2xpZW50L2pzb24uZ28=) | `0.00% <0.00%> (ø)` | | | [client/parse\_pem.go](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS#diff-Y2xpZW50L3BhcnNlX3BlbS5nbw==) | `31.52% <ø> (ø)` | | | [client/go\_client.go](https://codecov.io/gh/FISCO-BCOS/go-sdk/pull/195?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=FISCO-BCOS#diff-Y2xpZW50L2dvX2NsaWVudC5nbw==) | `30.13% <25.00%> (-0.95%)` | :arrow_down: | 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=FISCO-BCOS). 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=FISCO-BCOS)

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