refactor: progress getSuccessPercent

[afc163]

[中文版模板 / Chinese template]

🤔 This is a ...

• New feature
• Bug fix
• Site / documentation update
• Demo update
• Component style update
• TypeScript definition update
• Bundle size optimization
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💡 Background and solution

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🇺🇸 English
🇨🇳 Chinese

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View rendered components/progress/demo/segment.md

[ant-design-bot]

[ant-design-bot]

[lgtm-com]

This pull request introduces 2 alerts when merging a01700a into e6e149b - view on LGTM.com

new alerts:

• 2 for Useless assignment to local variable

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[github-actions]

Size Change: -243 B (0%)

Total Size: 806 kB

Filename	Size	Change
./dist/antd-with-locales.min.js	321 kB	-120 B (0%)
./dist/antd.min.js	289 kB	-123 B (0%)

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Filename	Size	Change
./dist/antd.compact.min.css	65 kB	0 B
./dist/antd.dark.min.css	66.3 kB	0 B
./dist/antd.min.css	65 kB	0 B

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