fix: fix golint warning

[KevinBetterQ]

Ⅰ. Describe what this PR did

fix golint warning：

1. pouch/daemon/config/config.go
   Line 183: warning: redundant if ...; err != nil check, just return error instead. (golint)
2. pouch/cri/v1alpha2/cri_utils.go
   Line 320: warning: redundant if ...; err != nil check, just return error instead. (golint)

Ⅱ. Does this pull request fix one issue?

NONE

Ⅲ. Why don't you add test cases (unit test/integration test)? (你真的觉得不需要加测试吗？)

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

Merging #2821 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #2821      +/-   ##
==========================================
+ Coverage   69.35%   69.37%   +0.01%     
==========================================
  Files         278      278              
  Lines       17448    17444       -4     
==========================================
  Hits        12101    12101              
+ Misses       3995     3993       -2     
+ Partials     1352     1350       -2

Flag	Coverage Δ
#criv1alpha2_test	39.22% <100%> (-0.03%)	⬇️
#integration_test_0	36.51% <50%> (-0.03%)	⬇️
#integration_test_1	35.37% <50%> (+0.04%)	⬆️
#integration_test_2	36.51% <50%> (+0.03%)	⬆️
#integration_test_3	35.41% <50%> (+0.08%)	⬆️
#node_e2e_test	34.96% <100%> (-0.07%)	⬇️
#unittest	28.75% <50%> (ø)	⬆️

Impacted Files	Coverage Δ
daemon/config/config.go	69.51% <100%> (+1.65%)	⬆️
cri/v1alpha2/cri_utils.go	89.07% <100%> (+0.23%)	⬆️
pkg/meta/store.go	67.44% <0%> (-1.56%)	⬇️
daemon/mgr/container_utils.go	82.38% <0%> (-1.14%)	⬇️
cri/v1alpha2/cri.go	71.22% <0%> (ø)	⬆️
ctrd/watch.go	78.37% <0%> (+5.4%)	⬆️

[CLAassistant]

All committers have signed the CLA.

[pouchrobot]

We found this is your first time to contribute to Pouch, @KevinBetterQ
👏 We really appreciate it.
Just remind that you have read the contribution guide: https://github.com/alibaba/pouch/blob/master/CONTRIBUTING.md
If you didn't, you should do that first. If done, welcome again and please enjoy hacking! 🍻

[fuweid]

@KevinBetterQ please git commit -s --amend --no-edit and repush again. thanks

[allencloud]

Thanks for your work. LGTM