remove redundant type assertions

[XiaoK29]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• [X] N
• [ ] Y

2. What is the scope of this PR (e.g. component or file name):

pkg/native/client_test.go pkg/parser/parser.go pkg/settings/utils_settings_yaml.go pkg/tools/format/kformat.go

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• [ ] Affects user behaviors
• [ ] Contains syntax changes
• [ ] Contains variable changes
• [ ] Contains experimental features
• [ ] Performance regression: Consumes more CPU
• [ ] Performance regression: Consumes more Memory
• [x] Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• [x] N
• [ ] Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• [ ] Unit test
• [ ] Integration test
• [ ] Benchmark (add benchmark stats below)
• [ ] Manual test (add detailed scripts or steps below)
• [x] Other

[coveralls]

Pull Request Test Coverage Report for Build 9218125442

Details

• 4 of 6 (66.67%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 62.358%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
pkg/tools/format/kformat.go	2	4	50.0%
<!--	Total:	4	6	66.67%	-->

Totals
Change from base Build 9170436795:	0.0%
Covered Lines:	3343
Relevant Lines:	5361

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💛 - Coveralls