docs: add performance.removeMomentLocale to upgrade guide

[chenjiahan]

Summary

Added a section in upgrade guide, explaining the removal of the performance.removeMomentLocale option and the reason for its deprecation.

Related Links

• feat!: remove performance.removeMomentLocale option #6991

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[gemini-code-assist]

Summary of Changes

Hello @chenjiahan, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the project's upgrade guide to inform users about the removal of the performance.removeMomentLocale configuration option. This change reflects an underlying improvement in Rspack v2, where Moment.js locales are no longer bundled by default, thus eliminating the need for a specific option to remove them. The update ensures that users migrating from v1 to v2 are aware of this change and its implications.

Highlights

• Documentation Update: Added a new section to the upgrade guide (v1 to v2) in both English and Chinese, detailing the removal of the performance.removeMomentLocale option.
• Option Deprecation Rationale: The documentation clarifies that performance.removeMomentLocale is no longer necessary because Rspack v2 does not include Moment.js locale data by default, rendering the option obsolete.

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[gemini-code-assist]

Code Review

This pull request adds documentation for the removal of the performance.removeMomentLocale option in the v1 to v2 upgrade guide for both English and Chinese. The changes are clear and accurate. My only suggestion is to reorder the new sections to maintain alphabetical order within the performance options group for better discoverability.

[Copilot]

Pull request overview

This PR adds documentation for the removal of the performance.removeMomentLocale configuration option in Rsbuild v2. The option is no longer necessary since Rspack v2 does not bundle Moment.js locale files by default.

Changes:

• Added a new section to the v1-to-v2 upgrade guide explaining the removal of performance.removeMomentLocale
• Included the rationale: Rspack v2 no longer includes Moment locales by default, making the optimization option obsolete
• Referenced the related PR #6991 for additional context

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
website/docs/en/guide/upgrade/v1-to-v2.mdx	Added English documentation section explaining the removal of performance.removeMomentLocale
website/docs/zh/guide/upgrade/v1-to-v2.mdx	Added Chinese documentation section explaining the removal of performance.removeMomentLocale

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