Delete Some Useless Codes

[aquarius-kuchain]

Summary

Del some useless code.

Modifys

• del protobuf:"XXX" tag in structs
• del useless msg def
• fix test error by api change

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• Targeted PR against correct branch
• Linked to Github issue with discussion.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes