chore: remove obsolete //+build comments

[xibeiyoumian]

Proposed changes

Go 1.17 introduced a new //go:build syntax that replaces the legacy
// +build form. This change cleans up the old tag.

More info: golang/go#41184

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Types of changes

• New feature added

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Please make sure to follow these points

• I have read the contributing guidelines.
• I have performed a self-review of my own code or work.
• I have commented my code, particularly in hard-to-understand areas.
• My changes generates no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• My changes have sufficient code coverage (unit, integration, e2e tests).

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Screenshots (If Applicable)

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Other Information

Any message for the reviewer or kick off the discussion by explaining why you considered this particular solution, any alternatives etc.